Add regression tests for goto-cc compiler mode personalities

[tautschnig]

Tests goto-cl, goto-link, goto-armcc, goto-as, and goto-cw modes via a modes.sh helper that creates symlinks to goto-cc. Exercises ms_cl_mode.cpp, ms_link_mode.cpp, armcc_mode.cpp, as_mode.cpp, and cw_mode.cpp which previously had 0% coverage.

• Each commit message has a non-empty body, explaining why the change was made.
• n/a Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• n/a 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.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.55%. Comparing base (85c204f) to head (59e4d16).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8871      +/-   ##
===========================================
+ Coverage    80.41%   80.55%   +0.13%     
===========================================
  Files         1703     1703              
  Lines       188398   188398              
  Branches        73       73              
===========================================
+ Hits        151498   151757     +259     
+ Misses       36900    36641     -259     

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