Add Oracle support to DBMS

[modular-magician]

Fixes #15647

Adds support for Oracle profiles in DBMS, additionally adds missing static/private connectivity support to postgres profiles (that was also included with the Oracle profiles).

Two quirks happening here:
We can not actually create an oracle DB for testing (so the created tests fail, as it actually tests a connection to the supplied db)
The data stream private connection is actually a more generic resource than just data stream (reaches the same downstream URI with the same structure), so it would work for that oracle test... in theory

Release Note Template for Downstream PRs (will be copied)

databasemigrationservice: added support for `oracle` profiles to `google_database_migration_service_connection_profile`

Derived from GoogleCloudPlatform/magic-modules#9114

[github-actions]

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