Add remove-function-body-regex command line option

[tautschnig]

This extends the existing remove-function-body option in goto-instrument with support for regular expressions to specify a broader set of functions.

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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).
• n/a My commit message includes data points confirming performance improvements (if claimed).
• My PR is restricted to a single feature or bugfix.
• n/a White-space or formatting changes outside the feature-related changed lines are in commits of their own.

[codecov]

Codecov Report

❌ Patch coverage is 86.66667% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.40%. Comparing base (6c3978f) to head (61bd09f).
⚠️ Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/goto-instrument/remove_function.cpp	84.61%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #8712   +/-   ##
========================================
  Coverage    80.39%   80.40%           
========================================
  Files         1688     1688           
  Lines       207411   207441   +30     
  Branches        73       73           
========================================
+ Hits        166757   166783   +26     
- Misses       40654    40658    +4     

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[tautschnig]

Requires #8711 for CI to pass.