* Added support to create/delete mulitiple databases in MySQL
Fixes: #58370
* Added additional tests cases and fixed documentation changes
* Code refactoring and added tests for better test coverage
- Removed db_exists usage from most of the code. Used existence_list
and non_existence_list instead
- Added additional tests to cover all scenarios w.r.t creation and deletion
on multiple databases
- Added tests for dump operations
* Minor fix
* Minor fix - create check mode test
* Added dump tests for better dump tests coverage
* Removed minor database connection details
* fixed error
* Added test case for import operations
* Code refactoring and review fixes
- Added dump all test case
* Fixed review comments
* Minor review comment fixes
* Altered db_create return value
* Removed db_list and altered "does exist" to just "exist"
* Kept db and db_list in module.exit_json
* Refactored tests
- Added removal of dump2 file
* Moved import tests to state_dump_import file
* Removed import tests from multi_db_create_delete
* Updated porting guide, added RETURN block
* Minor identation fix
* Added validation to check if databases are dumped
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