Embed pymysql within the collection and use default test container

This change eliminates the need to install the connector on each
controlled node, as `pymysql` version 1.1.1 is now included. As a
result, we can safely assume its availability, thus simplifying the
testing process.

Also, I managed to remove the need for pre-built test containers. We
now use the default test containers from ansible-test.

tests/integration/targets/test_mysql_info/tasks/connector_info.yml

@@ -1,30 +0,0 @@
----
-# Added in 3.6.0 in
-# https://github.com/ansible-collections/community.mysql/pull/497
-
-- name: Connector info | Assert connector_name exists and has expected values
-  ansible.builtin.assert:
-    that:
-      - result.connector_name is defined
-      - result.connector_name is in ['pymysql', 'MySQLdb']
-    success_msg: >-
-      Assertions passed, result.connector_name is {{ result.connector_name }}
-    fail_msg: >-
-      Assertion failed, result.connector_name is
-      {{ result.connector_name | d('Unknown')}} which is different than expected
-      pymysql or MySQLdb
-
-- name: Connector info | Assert connector_version exists and has expected values
-  ansible.builtin.assert:
-    that:
-      - result.connector_version is defined
-      - >
-        result.connector_version == 'Unknown'
-        or result.connector_version is version(connector_version, '==')
-    success_msg: >-
-      Assertions passed, result.connector_version is
-      {{ result.connector_version }}
-    fail_msg: >-
-      Assertion failed, result.connector_version is
-      {{ result.connector_version }} which is different than expected
-      {{ connector_version }}

tests/integration/targets/test_mysql_info/tasks/issue-28.yml

@@ -48,19 +48,8 @@
         login_port: '{{ mysql_primary_port }}'
         ca_cert: /tmp/cert.pem
       register: result
-      ignore_errors: yes
-
-    - assert:
-        that:
-          - result is failed
-      when:
-        - connector_name == 'pymysql'
-
-    - assert:
-        that:
-          - result is succeeded
-      when:
-        - connector_name != 'pymysql'
+      failed_when:
+        - result is success
 
     - name: attempt connection with newly created user ignoring hostname
       mysql_info:

tests/integration/targets/test_mysql_info/tasks/main.yml

@@ -57,10 +57,6 @@
           - result.engines != {}
           - result.users != {}
 
-    - name: mysql_info - Test connector informations display
-      ansible.builtin.import_tasks:
-        file: connector_info.yml
-
     # Access by non-default cred file
     - name: mysql_info - check non-default cred file
       mysql_info: