Add option to only include specific targets in conversion

[attiasas]

• The pull request is targeting the dev branch.
• The code has been validated to compile successfully by running go vet ./....
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• All tests have passed. If this feature is not already covered by the tests, new tests have been added.
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• All changes are detailed at the description. if not already covered at JFrog Documentation, new documentation have been added.

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Add a new option to the results format convertor so it will only include specific targets at the converted results.

[github-actions]

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