transactional interceptor on repository interface

[njr-11]

Test coverage for Transactional interceptor being placed on a repository method (first commit).
Also contains a commit with refactoring to complete the move of RepositoryImpl methods to QueryInfo.

• I have considered the risk of behavior change or other zero migration impact (https://github.com/OpenLiberty/open-liberty/wiki/Behavior-Changes).
• If this PR fixes an Issue, the description includes "Fixes #FILLMEIN" or "Resolves #FILLMEIN" (verify release bug label if applicable: https://github.com/OpenLiberty/open-liberty/wiki/Open-Liberty-Conventions).
• If this PR resolves an external Known Issue (including APARS), the description includes "Fixes #FILLMEIN" or "Resolves #FILLMEIN".

[njr-11]

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[njr-11]

Build is stuck, trying again
#build (view Open Liberty Personal Build - ❌ completed with errors/failures.)

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[njr-11]

Build is stuck, trying again #build (view Open Liberty Personal Build - ❌ completed with errors/failures.)
(view Open Liberty Personal Build - ❌ completed with errors/failures.)

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All tests pass except for the widespread timeout issue that hits most builds in this unrelated test case:

Execution failed for task ':com.ibm.websphere.appserver.features:test'.
> Timeout has been exceeded

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• 3 FAT files were changed, added, or removed.

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