Backport 3237b8f471f5f3701622c6b08a953311e24fed1f

This should fix the PDO_OCI and oci8 test failures due to more verbose
output of Oracle DB 23.5.

Closes GH-16107.

Move installation of oracle instant client in GHA

Closes GH-12033

Test oci8 & pdo_oci in CI

Closes GH-8348