[PR #427/0a68bb27 backport][stable-1] CI is changed (#428)

* Is changed (#427)

* Refactor tests to use "is" and "is not" changed

* Refactor tests to use is succeeded or is failed

* Reformat indentation

* Add filter "bool" to prevent issues

(cherry picked from commit 0a68bb270f)

* Fix error message verification

I don't know why this works on main, but in stable-1, the error message
is "invalid privileges string: Invalid privileges specified:
frozenset({'INVALID'})"

* Add filter for test that won't work with mariadb

* Refactor test in their own file instead of main

* Add db_names dict

* Fix registered variable name

* Add missing fact

* Add test databases cleanup

* Cut tests for unsupported db name (%)

* Add missing default vars to tests db_formats

* Backport small diff from main

tests/integration/targets/test_mysql_variables/tasks/assert_var.yml

@@ -31,6 +31,6 @@
 - name: assert output mysql variable name and value
   assert:
     that:
-      - "result.changed | bool == true"
+      - result is changed
       - "'{{ var_name }}' in result.stdout"
       - "'{{ var_value }}' in result.stdout"