Adapt code to mysqlnd changes in the PHP 8.1 code base.

Note: the code should be fixed to not use deprecated template.

If the PHP used to run workes has a dynamic plugin loaded (because of its configuration) the old code would still append `-d extension=...` options and made the worker instance generate warnings which confuses communitcation with the worker.

The IP of the host of connecting user seen by the server can be different from the one on the host where tests are run. For example, this is the case when the test server runs inside a container. Therefore we create test user with generic host pattern `%` .

Update function parameter checks that are performed when building in dev-mode to accept "!" in type specifications.

Turns out that verifying type specs that include "!" requires more changes to the code. For now disabling checks if type spec contains "!".

Without this checks for, e.g., boost headers were failing on macOS (could be specific to clang which is used on macOS).