feat: add metadata_fields, sort, show_collections and fq params to "my data" API

[vera]

What this PR does / why we need it:

Adds support for metadata_fields, sort, show_collections and fq parameters to the My Data API. These options mirror the existing search API behavior and make the My Data endpoint more flexible and useful.

Which issue(s) this PR closes:

Not aware of an issue.

Special notes for your reviewer: /

Suggestions on how to test this:

I've added the following tests:

• mvn test -Dtest="DataRetrieverApiIT#testRetrieveMyDataWithMetadataFields"
• mvn test -Dtest="DataRetrieverApiIT#testRetrieveMyDataWithCollections"

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

/

Is there a release notes update needed for this change?:

I've added a release note.

Additional documentation:

/