[stable-1] Various backports from community.postgres (#1789)

* postgresql modules: various backports from community.postgresql

* Add postgresql_set community/postgresql/pull/52 backport

* Fix

* Update plugins/modules/database/postgresql/postgresql_set.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/database/postgresql/postgresql_set.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update changelogs/fragments/1-community-postgresql_backports.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Felix Fontein <felix@fontein.de>

tests/integration/targets/postgresql_set/tasks/postgresql_set_initial.yml

@@ -373,3 +373,70 @@
   - assert:
       that:
       - result is not changed
+
+  - name: Pass non-existent parameter
+    <<: *task_parameters
+    postgresql_set:
+      <<: *pg_parameters
+      name: Timezone
+      value: utc
+    register: result
+    ignore_errors: yes
+
+  - assert:
+      that:
+      - result is failed
+      - result.msg is search('No such parameter')
+
+  #######################################################################
+  # https://github.com/ansible-collections/community.postgresql/issues/48
+  - name: Pass a parameter containing b in check_mode
+    <<: *task_parameters
+    postgresql_set:
+      <<: *pg_parameters
+      name: archive_command
+      value: '/usr/bin/touch %f'
+    register: result
+    check_mode: yes
+
+  - assert:
+      that:
+      - result is changed
+
+  - name: Pass a parameter containing b
+    <<: *task_parameters
+    postgresql_set:
+      <<: *pg_parameters
+      name: archive_command
+      value: '/usr/bin/touch %f'
+    register: result
+
+  - assert:
+      that:
+      - result is changed
+
+  - name: Pass another parameter containing B in check_mode
+    <<: *task_parameters
+    postgresql_set:
+      <<: *pg_parameters
+      name: track_activity_query_size
+      value: '4096B'
+    register: result
+    check_mode: yes
+
+  - assert:
+      that:
+      - result is changed
+
+  - name: Pass another parameter containing b in check_mode
+    <<: *task_parameters
+    postgresql_set:
+      <<: *pg_parameters
+      name: track_activity_query_size
+      value: '2048b'
+    register: result
+    check_mode: yes
+
+  - assert:
+      that:
+      - result is changed