Fix nightly for 8.2

Backport of af721c9c361643df13a8137d22de9acde82512e5

Fix MySQL and MSSQL CI failures

* use mysql service container for nightly tests
* remove unnecessary mysql startup
* update mssql container to newer version

Closes GH-16011.

Test oci8 & pdo_oci in CI

Closes GH-8348