feat(Advisory): update self-reference to match changes of its components and make behavior configurable

[rramos-xx]

Closes #230

[github-actions]

Test Results

343 tests  +4   343 ✅ +4   50s ⏱️ +4s
 29 suites +3     0 💤 ±0 
 29 files   +3     0 ❌ ±0 

Results for commit f87725e. ± Comparison against base commit 1454522.

This pull request removes 2 and adds 6 tests. Note that renamed tests count towards both.

de.bsi.secvisogram.csaf_cms_backend.json.AdvisoryWrapperTest ‑ setFinalTrackingIdTest_label_not_null
de.bsi.secvisogram.csaf_cms_backend.json.AdvisoryWrapperTest ‑ setFinalTrackingIdTest_noHtmlReference

de.bsi.secvisogram.csaf_cms_backend.json.AdvisoryWrapperTest ‑ generateOrUpdateSelfReferenceTest_label_not_null
de.bsi.secvisogram.csaf_cms_backend.json.AdvisoryWrapperTest ‑ generateOrUpdateSelfReferenceTest_noHtmlReference
de.bsi.secvisogram.csaf_cms_backend.json.AdvisoryWrapperTest ‑ generateOrUpdateSelfReferenceTest_regeneratesOnTlpChange
de.bsi.secvisogram.csaf_cms_backend.service.AdvisorySelfReferenceAlwaysModeTest ‑ updateAdvisory_regeneratesSelfReferenceOnTlpChangeAfterPublish
de.bsi.secvisogram.csaf_cms_backend.service.AdvisorySelfReferenceInitialModeTest ‑ selfReference_generatedOnceAtFirstPublishAndUnaffectedByLaterTlpChange
de.bsi.secvisogram.csaf_cms_backend.service.AdvisorySelfReferenceNeverModeTest ‑ selfReference_neverGeneratedAtPublishOrOnLaterUpdate

[github-actions]

Overall Project	88.01% -0.34%	🍏
Files changed	83.54%	🍏

File	Coverage
SelfRefRegenerationMode.java	100%	🍏
AdvisoryWrapper.java	97.83%	🍏
AdvisoryService.java	89.81% -1.5%	🍏
PostConstructActions.java	0% -6.67%	❌