feat(dsp): add transformer for JsonObjectToDataAddress

[paullatzelsperger]

What this PR changes/adds

Adds a JsonObjectToDataAddressTransformer plus tests.

Why it does that

DataAddresses must be (JSON-LD)-type-aware, so we need a transformer for it.

Further notes

this PR is needed for #2767

• I had to (re-)create the CoreConstants.java into the core-spi, because we need access to the EDC_NAMESPACE. This is already done in PR feat(api): create new Asset API #2807, but that is not yet merged.

Linked Issue(s)

Needed for #2767
Needed for #2806

Checklist

• added appropriate tests?
• performed checkstyle check locally?
• added/updated copyright headers?
• documented public classes/methods?
• added/updated relevant documentation?
• assigned appropriate label? (exclude from changelog with label no-changelog)
• formatted title correctly? (take a look at the CONTRIBUTING and Etiquette for pull requests for details)

[codecov-commenter]

Codecov Report

Patch coverage: 76.19% and project coverage change: +0.07 🎉

Comparison is base (e0717bd) 65.87% compared to head (4203745) 65.95%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2811      +/-   ##
==========================================
+ Coverage   65.87%   65.95%   +0.07%     
==========================================
  Files         974      982       +8     
  Lines       19770    19847      +77     
  Branches     1168     1169       +1     
==========================================
+ Hits        13024    13090      +66     
- Misses       6278     6288      +10     
- Partials      468      469       +1     

Impacted Files	Coverage Δ
...nsformer/DspTransferProcessTransformExtension.java	0.00% <0.00%> (ø)
.../org/eclipse/edc/spi/types/domain/DataAddress.java	84.84% <25.00%> (ø)
...sformer/to/JsonObjectToDataAddressTransformer.java	92.85% <92.85%> (ø)
...ype/from/JsonObjectFromDataAddressTransformer.java	100.00% <100.00%> (ø)
...ansformer/from/JsonObjectFromAssetTransformer.java	100.00% <100.00%> (ø)

... and 10 files with indirect coverage changes

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[jimmarino]

minor nit if you want to add the constant or not, it's up to you.