fix: handle iterable Criterion operandRight

[ndr-brt]

What this PR changes/adds

Make JsonObjectToCriterionDtoTransformer handle in operator correctly

Why it does that

support "in" operator

Further notes

• cleaned up some unused methods

Linked Issue(s)

Fix #3216

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[codecov-commenter]

Codecov Report

Patch coverage: 70.00% and project coverage change: -0.26 ⚠️

Comparison is base (36aa899) 65.37% compared to head (dd9110d) 65.11%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3218      +/-   ##
==========================================
- Coverage   65.37%   65.11%   -0.26%     
==========================================
  Files         837      837              
  Lines       16822    16777      -45     
  Branches      926      918       -8     
==========================================
- Hits        10998    10925      -73     
- Misses       5452     5487      +35     
+ Partials      372      365       -7     

Impacted Files	Coverage Δ
...main/java/org/eclipse/edc/spi/query/Criterion.java	25.80% <0.00%> (ø)
...nld/spi/transformer/AbstractJsonLdTransformer.java	15.22% <0.00%> (+2.88%)	⬆️
...ansformer/JsonObjectToCriterionDtoTransformer.java	100.00% <100.00%> (+20.00%)	⬆️

... and 5 files with indirect coverage changes

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