Fix compatibility with ansible=6 / ansible-core=2.13

Details here: https://docs.ansible.com/ansible/devel/porting_guides/porting_guide_6.html#id36

Basically:

```yaml
- name: Prior to 2.13
  debug:
    msg: '[1] + {{ [2] }}'

- name: 2.13 and forward
  debug:
    msg: '{{ [1] + [2] }}'
```

Interestingly, we had been using the new/safe syntax in lofs of places.

We were using the broken one in many others though. Hopefully all
instances were fixed by this patch.

roles/matrix-synapse/tasks/ext/encryption-disabler/setup_install.yml

@@ -27,11 +27,15 @@
       }}
 
     matrix_synapse_container_extra_arguments: >
-      {{ matrix_synapse_container_extra_arguments|default([]) }}
-      +
-      ["--mount type=bind,src={{ matrix_synapse_ext_path }}/matrix_e2ee_filter.py,dst={{ matrix_synapse_in_container_python_packages_path }}/matrix_e2ee_filter.py,ro"]
+      {{
+        matrix_synapse_container_extra_arguments|default([])
+        +
+        ["--mount type=bind,src={{ matrix_synapse_ext_path }}/matrix_e2ee_filter.py,dst={{ matrix_synapse_in_container_python_packages_path }}/matrix_e2ee_filter.py,ro"]
+      }}
 
     matrix_synapse_additional_loggers: >
-      {{ matrix_synapse_additional_loggers }}
-      +
-      {{ [{'name': 'matrix_e2ee_filter', 'level': 'INFO'}] }}
+      {{
+        matrix_synapse_additional_loggers
+        +
+        [{'name': 'matrix_e2ee_filter', 'level': 'INFO'}]
+      }}

roles/matrix-synapse/tasks/ext/ldap-auth/setup.yml

@@ -4,7 +4,9 @@
     matrix_synapse_password_providers_enabled: true
 
     matrix_synapse_additional_loggers: >
-      {{ matrix_synapse_additional_loggers }}
-      +
-      {{ [{'name': 'ldap_auth_provider', 'level': 'INFO'}] }}
+      {{
+        matrix_synapse_additional_loggers
+       +
+        [{'name': 'ldap_auth_provider', 'level': 'INFO'}]
+      }}
   when: matrix_synapse_ext_password_provider_ldap_enabled|bool

roles/matrix-synapse/tasks/ext/mjolnir-antispam/setup_install.yml

@@ -34,19 +34,23 @@
 
 - set_fact:
     matrix_synapse_spam_checker: >
-      {{ matrix_synapse_spam_checker }}
-      +
-      [{
-        "module": "mjolnir.AntiSpam",
-        "config": {
-          "block_invites": {{ matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_invites }},
-          "block_messages": {{ matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_messages }},
-          "block_usernames": {{ matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_usernames }},
-          "ban_lists": {{ matrix_synapse_ext_spam_checker_mjolnir_antispam_config_ban_lists }}
-        }
-      }]
+      {{
+        matrix_synapse_spam_checker
+        +
+        [{
+          "module": "mjolnir.AntiSpam",
+          "config": {
+            "block_invites": matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_invites,
+            "block_messages": matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_messages,
+            "block_usernames": matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_usernames,
+            "ban_lists": matrix_synapse_ext_spam_checker_mjolnir_antispam_config_ban_lists,
+          }
+        }]
+      }}
 
     matrix_synapse_container_extra_arguments: >
-      {{ matrix_synapse_container_extra_arguments|default([]) }}
-      +
-      ["--mount type=bind,src={{ matrix_synapse_ext_path }}/mjolnir/synapse_antispam/mjolnir,dst={{ matrix_synapse_in_container_python_packages_path }}/mjolnir,ro"]
+      {{
+        matrix_synapse_container_extra_arguments|default([])
+        +
+        ["--mount type=bind,src={{ matrix_synapse_ext_path }}/mjolnir/synapse_antispam/mjolnir,dst={{ matrix_synapse_in_container_python_packages_path }}/mjolnir,ro"]
+      }}

roles/matrix-synapse/tasks/ext/rest-auth/setup_install.yml

@@ -22,11 +22,15 @@
     matrix_synapse_password_providers_enabled: true
 
     matrix_synapse_container_extra_arguments: >
-      {{ matrix_synapse_container_extra_arguments|default([]) }}
-      +
-      ["--mount type=bind,src={{ matrix_synapse_ext_path }}/rest_auth_provider.py,dst={{ matrix_synapse_in_container_python_packages_path }}/rest_auth_provider.py,ro"]
+      {{
+        matrix_synapse_container_extra_arguments|default([])
+        +
+        ["--mount type=bind,src={{ matrix_synapse_ext_path }}/rest_auth_provider.py,dst={{ matrix_synapse_in_container_python_packages_path }}/rest_auth_provider.py,ro"]
+      }}
 
     matrix_synapse_additional_loggers: >
-      {{ matrix_synapse_additional_loggers }}
-      +
-      {{ [{'name': 'rest_auth_provider', 'level': 'INFO'}] }}
+      {{
+        matrix_synapse_additional_loggers
+        +
+        [{'name': 'rest_auth_provider', 'level': 'INFO'}]
+      }}

roles/matrix-synapse/tasks/ext/shared-secret-auth/setup_install.yml

@@ -37,11 +37,15 @@
       }}
 
     matrix_synapse_container_extra_arguments: >
-      {{ matrix_synapse_container_extra_arguments|default([]) }}
-      +
-      ["--mount type=bind,src={{ matrix_synapse_ext_path }}/shared_secret_authenticator.py,dst={{ matrix_synapse_in_container_python_packages_path }}/shared_secret_authenticator.py,ro"]
+      {{
+        matrix_synapse_container_extra_arguments|default([])
+        +
+        ["--mount type=bind,src={{ matrix_synapse_ext_path }}/shared_secret_authenticator.py,dst={{ matrix_synapse_in_container_python_packages_path }}/shared_secret_authenticator.py,ro"]
+      }}
 
     matrix_synapse_additional_loggers: >
-      {{ matrix_synapse_additional_loggers }}
-      +
-      {{ [{'name': 'shared_secret_authenticator', 'level': 'INFO'}] }}
+      {{
+        matrix_synapse_additional_loggers
+        +
+        [{'name': 'shared_secret_authenticator', 'level': 'INFO'}]
+      }}

roles/matrix-synapse/tasks/ext/synapse-simple-antispam/setup_install.yml

@@ -39,16 +39,20 @@
 
 - set_fact:
     matrix_synapse_modules: >
-      {{ matrix_synapse_modules }}
-      +
-      [{
-        "module": "synapse_simple_antispam.AntiSpamInvites",
-        "config": {
-          "blocked_homeservers": {{ matrix_synapse_ext_spam_checker_synapse_simple_antispam_config_blocked_homeservers }}
-        }
-      }]
+      {{
+        matrix_synapse_modules
+        +
+        [{
+          "module": "synapse_simple_antispam.AntiSpamInvites",
+          "config": {
+            "blocked_homeservers": matrix_synapse_ext_spam_checker_synapse_simple_antispam_config_blocked_homeservers
+          }
+        }]
+      }}
 
     matrix_synapse_container_extra_arguments: >
-      {{ matrix_synapse_container_extra_arguments|default([]) }}
-      +
-      ["--mount type=bind,src={{ matrix_synapse_ext_path }}/synapse-simple-antispam/synapse_simple_antispam,dst={{ matrix_synapse_in_container_python_packages_path }}/synapse_simple_antispam,ro"]
+      {{
+        matrix_synapse_container_extra_arguments|default([])
+        +
+        ["--mount type=bind,src={{ matrix_synapse_ext_path }}/synapse-simple-antispam/synapse_simple_antispam,dst={{ matrix_synapse_in_container_python_packages_path }}/synapse_simple_antispam,ro"]
+      }}