Rename variables of Postmoogle to handle it as a bridge (#3698)

* Rename variables matrix_bot_postmoogle_* with matrix_postmoogle_*

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Rename file names and references to those files

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Move variables block for /matrix-bridge-postmoogle

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Rename matrix_playbook_bot_postmoogle_ to matrix_playbook_bridge_postmoogle_

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Add matrix_playbook_migration_matrix_postmoogle_migration_validation_enabled

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

* Replace an install tag example with "-bot" prefix

The previous example seems to have been selected to show how components whose name contains "-bot-" needed to be specified.

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

---------

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>
Co-authored-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

roles/custom/matrix_playbook_migration/defaults/main.yml

@@ -27,6 +27,9 @@ matrix_playbook_migration_matrix_aux_migration_validation_enabled: true
 # Controls if (`matrix_jitsi` -> `jitsi`) validation will run.
 matrix_playbook_migration_matrix_jitsi_migration_validation_enabled: true
 
+# Controls if (`matrix_bot_postmoogle_` -> `matrix_postmoogle_`) validation will run.
+matrix_playbook_migration_matrix_postmoogle_migration_validation_enabled: true
+
 # Controls if the old apt repository (likely without a `signed-by` option) on Debian-based systems will be removed.
 #
 # Older versions of the Docker role (5.x, 6.x) used to install a repository at a path like: `/etc/apt/sources.list.d/download_docker_com_linux_*`