feat(IATP): pluggable constraint to scope mapping

[wolf4ood]

What this PR changes/adds

Add pluggable constraints to scope mapping:

• Introduces ScopeExtractorRegistry for registering custom extractors.
• Implements IatpScopeExtractorFunction and register it as pre-validator in the policy engine for invoking estractors in the registry and map the result in the scope

ScopeExtractor for now are not tied to a specific scope or rule.

Why it does that

iatp adoption

Linked Issue(s)

Closes #3492

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[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (7ca9375) 72.00% compared to head (271c5a0) 72.09%.
Report is 3 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3593      +/-   ##
==========================================
+ Coverage   72.00%   72.09%   +0.09%     
==========================================
  Files         893      897       +4     
  Lines       17855    17920      +65     
  Branches     1015     1018       +3     
==========================================
+ Hits        12856    12920      +64     
- Misses       4562     4563       +1     
  Partials      437      437              

Files	Coverage Δ
...entitytrust/core/IatpDefaultServicesExtension.java	89.47% <100.00%> (+0.58%)	⬆️
...st/core/defaults/DefaultTrustedIssuerRegistry.java	100.00% <ø> (ø)
.../core/defaults/InMemorySignatureSuiteRegistry.java	0.00% <ø> (ø)
...tytrust/core/scope/IatpScopeExtractorFunction.java	100.00% <100.00%> (ø)
...tytrust/core/scope/IatpScopeExtractorRegistry.java	100.00% <100.00%> (ø)
...itytrust/core/scope/IatpScopeExtractorVisitor.java	100.00% <100.00%> (ø)
...dentitytrust/core/IatpScopeExtractorExtension.java	85.71% <85.71%> (ø)

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