feat: Add support for the connector pymysql 1.0.2 (#533)

* Document connector-version relationship

* Fix missing option in the command usage documentation

* Rephrase commands descriptions

* Document that pymysql 0.10.0 disabled its warnings

* Disable tests for pymysql newer than 0.10.0 because the behavior changed

* Enable integration tests for pymysql 1.0.2

* Add exclusion to avoid requesting nonexistent test containers

* Cut comments about PyMySQL 1.0.2 need to be fixed

* docs: explain PyMySQL 0.10.0+ returns changed when using IF EXISTS

plugins/modules/mysql_query.py

@@ -26,9 +26,9 @@ options:
       as a formatting character. All literal C(%) characters in the query should be
       escaped as C(%%).
     - Note that if you use the C(IF EXISTS/IF NOT EXISTS) clauses in your query
-      and C(mysqlclient) connector, the module will report that
-      the state has been changed even if it has not. If it is important in your
-      workflow, use the C(PyMySQL) connector instead.
+      and C(mysqlclient) or C(PyMySQL 0.10.0+) connectors, the module will report
+      that the state has been changed even if it has not. If it is important in your
+      workflow, use the C(PyMySQL 0.9.3) connector instead.
     type: raw
     required: true
   positional_args:
@@ -222,7 +222,8 @@ def main():
                     # When something is run with IF NOT EXISTS
                     # and there's "already exists" MySQL warning,
                     # set the flag as True.
-                    # PyMySQL throws the warning, mysqlclinet does NOT.
+                    # PyMySQL < 0.10.0 throws the warning, mysqlclient
+                    # and PyMySQL 0.10.0+ does NOT.
                     already_exists = True
 
         except Exception as e: