deprecate: Raise deprecation levels of API elements

[bog-walk]

Note: The following elements had most recent level change in release 0.44.1 (October 2023).

Raise from ERROR to HIDDEN:

• ExposedDatabaseMetadata interface property currentScheme

Currently HIDDEN, now removed:

• Op.kt classes: LikeOp and NotLikeOp

Additional: The original buildSrc/Versions object was deprecated in release 0.46.0 (January 2024) in PR #1887 . Its level is now raised to ERROR.