Add Enum support for `deprecated` argument

What does this MR do?

This MR adds support for deprecated argument for enum values.

!27464 (merged) added the deprecated keyword for fields to allow us to specify the milestone that a field was deprecated in a structured way.

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done