Upgrade Synapse (1.46.0 -> 1.47.0)

We had to remove UID/GID environment variables that we used to pass
to the Synapse container, because it was causing a problem after
https://github.com/matrix-org/synapse/pull/11209

We were using both `--user` and UID/GID environment variables until now.

roles/matrix-synapse/vars/workers.yml

@@ -271,19 +271,19 @@ matrix_synapse_workers_media_repository_endpoints:
   # expose the `media` resource. For example:
 
   # ```yaml
-  #     worker_listeners:
-  #      - type: http
-  #        port: 8085
-  #        resources:
-  #          - names:
-  #            - media
+  # worker_listeners:
+  #  - type: http
+  #    port: 8085
+  #    resources:
+  #      - names:
+  #        - media
   # ```
 
   # Note that if running multiple media repositories they must be on the same server
   # and you must configure a single instance to run the background tasks, e.g.:
 
   # ```yaml
-  #     media_instance_running_background_jobs: "media-repository-1"
+  # media_instance_running_background_jobs: "media-repository-1"
   # ```
 
   # Note that if a reverse proxy is used , then `/_matrix/media/` must be routed for both inbound client and federation requests (if they are handled separately).
@@ -319,7 +319,9 @@ matrix_synapse_workers_frontend_proxy_endpoints:
   # the `worker_main_http_uri` setting in the `frontend_proxy` worker configuration
   # file. For example:
 
-  #     worker_main_http_uri: http://127.0.0.1:{{ matrix_synapse_container_client_api_port }}
+  # ```yaml
+  # worker_main_http_uri: http://127.0.0.1:8008
+  # ```
 
 matrix_synapse_workers_avail_list:
   - appservice