Create AttributeAccessor utility class

[J3173]

Create AttributeAccessor utility class to provide access to the attributes of AOM and RM objects.

This new class is fully documented and tested. It handles all logic and exception handling of reflections internally and clearly defines which exceptions are thrown when.

This new class replaces the RMObjectAttributes class and the set, addElementToList and addElementToListOrSetSingleValues methods of RMObjectCreator. These are now deprecated.

Although the AttributeAccessor is not directly related to the AOM, it is defined in the AOM subproject as the ModelInfoLookup interface (which is needed by AttributeAccessor) is defined in that subproject. This allows the AttributeAccessor to be used without depending on the path-queries or tools subproject.

[codecov]

Codecov Report

❌ Patch coverage is 85.94595% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.18%. Comparing base (cc04a76) to head (af67dcb).

Files with missing lines	Patch %	Lines
.../main/java/com/nedap/archie/query/RMPathQuery.java	67.74%	15 Missing and 5 partials ⚠️
...nedap/archie/rules/evaluation/AssertionsFixer.java	68.75%	4 Missing and 1 partial ⚠️
...ain/java/com/nedap/archie/aom/CAttributeTuple.java	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #732      +/-   ##
============================================
+ Coverage     72.03%   72.18%   +0.15%     
- Complexity     7151     7185      +34     
============================================
  Files           677      678       +1     
  Lines         23277    23343      +66     
  Branches       3764     3778      +14     
============================================
+ Hits          16767    16851      +84     
+ Misses         4769     4753      -16     
+ Partials       1741     1739       -2     

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