Add remaining SMT bv functions to theory

[thomasspriggs]

This PR add remaining SMT bv functions to theory. This should entail a full set of functions being present once the PR is merged.

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• Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• The feature or user visible behaviour I have added or modified has been documented in the User Guide in doc/cprover-manual/
• Regression or unit tests are included, or existing tests cover the modified code (in this case I have detailed which ones those are in the commit message).
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[TGWDB]

Probably best to rename concat here to compare to make the code clearer.

[thomasspriggs]

Done.

[codecov]

Codecov Report

Merging #6669 (e59a77c) into develop (b26ad8b) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #6669      +/-   ##
===========================================
+ Coverage    76.76%   76.81%   +0.05%     
===========================================
  Files         1582     1582              
  Lines       182360   182767     +407     
===========================================
+ Hits        139992   140396     +404     
- Misses       42368    42371       +3     

Impacted Files	Coverage Δ
...solvers/smt2_incremental/smt_bit_vector_theory.cpp	100.00% <100.00%> (ø)
...solvers/smt2_incremental/smt_bit_vector_theory.cpp	100.00% <100.00%> (ø)
src/util/signal_catcher.cpp	84.61% <0.00%> (-11.54%)	⬇️

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