Add non-determinism to array_address_of test

[thomasspriggs]

This test is intended to cover incremental SMT decision procedure support expressions of the form address_of(array[0]). These occur as part of the conversion from array to pointer, which may be implicitly introduced by applying __CPROVER_OBJECT_SIZE to an array. The existing test is not actually checking this conversion due to it being simplified away during constant propagation. The introduction of non-determinism in this commit prevents constant propagation from removing expressions of this form, so that their conversion will actually be tested.

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[codecov]

Codecov Report

Merging #7108 (e35425e) into develop (e6fc280) will increase coverage by 0.04%.
The diff coverage is 94.91%.

❗ Current head e35425e differs from pull request most recent head 1b5fa34. Consider uploading reports for the commit 1b5fa34 to get more accurate results

@@             Coverage Diff             @@
##           develop    #7108      +/-   ##
===========================================
+ Coverage    77.87%   77.91%   +0.04%     
===========================================
  Files         1576     1576              
  Lines       181587   181611      +24     
===========================================
+ Hits        141412   141511      +99     
+ Misses       40175    40100      -75     

Impacted Files	Coverage Δ
src/cpp/cpp_template_type.h	52.94% <0.00%> (-11.35%)	⬇️
src/goto-instrument/dump_c.cpp	80.86% <0.00%> (ø)
src/goto-instrument/function.cpp	0.00% <0.00%> (ø)
src/ansi-c/c_typecheck_type.cpp	77.16% <86.66%> (+0.05%)	⬆️
.../src/java_bytecode/java_bytecode_convert_class.cpp	94.18% <100.00%> (+0.01%)	⬆️
...src/java_bytecode/java_bytecode_typecheck_type.cpp	96.00% <100.00%> (ø)
jbmc/src/java_bytecode/java_object_factory.cpp	94.40% <100.00%> (+0.02%)	⬆️
jbmc/src/java_bytecode/java_pointer_casts.cpp	92.50% <100.00%> (ø)
jbmc/src/java_bytecode/java_types.cpp	95.13% <100.00%> (+0.02%)	⬆️
src/ansi-c/c_typecast.cpp	80.65% <100.00%> (ø)
... and 27 more

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