feat: Rework of Reference Hints

[mandelsoft]

What this PR does / why we need it

Rework a design flaw with reference hints in access specifications.

see docs/adrs/0003-reference-hints.md](docs/adrs/0003-reference-hints.md #1213

Which issue(s) this PR fixes

Fixes #1213

Incompatible Changes:

Component Version Representation

• The new library creates always typed hints for new elements. Old hints are
  left as they are. This means, that old versions of the OCM tooling
  cannot work correctly with component versions with persisted hints in
  access specifications
• If explicit hints are created, they are not observed by old tool versions.
  Those component versions cannot be verified by an older tool version.

OCM Library

• The SetResourceBlob and SetSourceBlob API methods now accept
  a hint specification instead of a string. To be as compatible as possible,
  it still accepts a string (as before), which is mapped by a hint parser to a hint list.
  Therefore, the technical type is interface{}, which accepts
  various effective types (single hints, string and hint lists).

• Uploaders provided by a plugin now get a serialized hint list
  instead of a simple untyped reference format.

• There are new options for creating resource(source access objects.