[IDEA] feat!: discriminate every BomRef as promissed

[jkowalleck]

Note

This is a draft, an idea.

The philosophy/contract of this library, i it's early days, was to auto-populate all bom-refs,
so the JSON/XML result after deserializarion might be Bom-Link-able out of the box.

Over the years, some new bom-refs were introduced, and did no longer auto-populatd (maybe they were forgotten? maybe on purpose to prevent breaking changes?)

This PR is a fix to follow that contract, again.

---

BREAKING change

• All known BomRefs for model classes are autopopulated when deserializing.
• All known BomRefs for model classes are properly discriminated when deserializing.

TODO / DONE

• have all the existing bomRefs added to BomRefDiscriminator.from_bom()
  • PostalAddress
  • Requirement
  • Level
  • Standard
• adjust test's models if needed

---

• on top of #938

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.01%	✅ 100.00% (target: 80.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (0898cf7)	5684	5323	93.65%
Head commit (68794c4)	5695 (+11)	5334 (+11)	93.66% (+0.01%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#861)	12	12	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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