feat: allow unchecked SQL operators

[paullatzelsperger]

What this PR changes/adds

This PR adds an overloaded constructor for the SqlQueryStatement class that allows
to disable the operator checking.
That means, that the SqlQueryStatement won't throw an IllegalArgumentException anymore when it encounters
a supposedly illegal operator.

Why it does that

Postgres has some very specific operators, such as the ?, which can be used for JSONB (not JSON!) types. The ? can be used to comfortably check if a value occurs in a JSON array:

SELECT *
FROM sometable
WHERE (someJsonColumn -> 'stringarray_prop')::jsonb ? 'someval_that_occurs_in_the_array';

Check out this stackoverflow article for another example.

Now, since we do strict checks on =, in, like, constructing such a query would not be possible.

Further notes

• It would have been possible to simply at the ? operator to the SqlConditionExpression.SUPPORTED_PREPARED_STATEMENT_OPERATORS list, but then we're dragging Postgres-specific operators into the otherwise generic SqlQueryExpression and that felt wrong.

  Although I haven't verified this, there could be other operators. Typically, if the usage of those operators is needed, we're dealing with a very niche use case, where operator validation can likely be foregone.

• In passing, I added a branch in the the criterion converter to account for enum ordinals, not just literals. That appears to have been a bug.

• Added an overloaded constructor for the ReflectionBasedQueryResolver to customize the criterion-to-predicate conversion

Linked Issue(s)

Needed for eclipse-edc/IdentityHub#188

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[codecov-commenter]

Codecov Report

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

Comparison is base (07dfdcc) 71.73% compared to head (37f1157) 71.74%.

Files	Patch %	Lines
.../core/store/CriterionToPredicateConverterImpl.java	80.00%	0 Missing and 1 partial ⚠️

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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3698   +/-   ##
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  Coverage   71.73%   71.74%           
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  Files         919      919           
  Lines       18452    18458    +6     
  Branches     1034     1037    +3     
=======================================
+ Hits        13236    13242    +6     
  Misses       4757     4757           
  Partials      459      459           

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