Migrate SKIPIF -> EXTENSIONS (#7138)

This is an automated migration of most SKIPIF extension_loaded checks.

Removed the "oci_internal_debug" function and its alias. Also deprecated the "ocifetchinto" function.

Closes GH-5810

Replace EXPECTF when possible

Closes GH-5779

Deprecate function aliases in oci8 extension.

Closes GH-5589