Fix NPE for IN clause on constant STRING dictionary

[Jackie-Jiang]

Fixes #11929

[codecov-commenter]

Codecov Report

Merging #11930 (8bee7bd) into master (03a9ec7) will decrease coverage by 0.01%.
Report is 1 commits behind head on master.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master   #11930      +/-   ##
============================================
- Coverage     61.42%   61.41%   -0.01%     
- Complexity     1141     1147       +6     
============================================
  Files          2378     2378              
  Lines        128845   128865      +20     
  Branches      19924    19927       +3     
============================================
+ Hits          79144    79148       +4     
- Misses        43983    43998      +15     
- Partials       5718     5719       +1     

Flag	Coverage Δ
custom-integration1	<0.01% <0.00%> (ø)
integration	<0.01% <0.00%> (ø)
integration1	<0.01% <0.00%> (ø)
integration2	0.00% <0.00%> (ø)
java-11	34.73% <0.00%> (-26.66%)	⬇️
java-21	61.29% <0.00%> (+<0.01%)	⬆️
skip-bytebuffers-false	61.40% <0.00%> (-0.02%)	⬇️
skip-bytebuffers-true	34.62% <0.00%> (-26.65%)	⬇️
temurin	61.41% <0.00%> (-0.01%)	⬇️
unittests	61.41% <0.00%> (-0.01%)	⬇️
unittests1	46.63% <0.00%> (-0.02%)	⬇️
unittests2	27.64% <0.00%> (+<0.01%)	⬆️

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Files	Coverage Δ
...t/index/readers/ConstantValueStringDictionary.java	20.68% <0.00%> (-5.40%)	⬇️

... and 16 files with indirect coverage changes

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