APP-1447 - Add keep promotion type

[shiral-jfrog]

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• The code has been validated to compile successfully by running go vet ./....
• The code has been formatted properly using go fmt ./....
• All static analysis checks passed.
• All tests have passed. If this feature is not already covered by the tests, new tests have been added.
• All integration tests have passed locally as they cannot be automated yet.
• All changes are detailed at the description. if not already covered at JFrog Documentation, new documentation have been added.

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[github-actions]

All contributors have signed the CLA ✍️ ✅
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[shiral-jfrog]

I have read the CLA Document and I hereby sign the CLA

[github-actions]

Test Results

16 tests  ±0   16 ✅ ±0   1m 35s ⏱️ -2s
 2 suites ±0    0 💤 ±0 
 1 files   ±0    0 ❌ ±0 

Results for commit c33fe02. ± Comparison against base commit a68c3ac.

♻️ This comment has been updated with latest results.