fix: stubs CLI test

[dipinknair]

Tests run fine on 242, but fails in candidate because cli_impl takes mechanical path from local installed path. hence ansys-mechanical-ideconfig will throw exception.

• Add check for available stubs version
• Add necessary test

[codecov]

Codecov Report

Attention: Patch coverage is 95.23810% with 1 line in your changes missing coverage. Please review.

Project coverage is 85.44%. Comparing base (4acf478) to head (82ee548).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #952      +/-   ##
==========================================
+ Coverage   81.05%   85.44%   +4.39%     
==========================================
  Files          36       36              
  Lines        2280     2309      +29     
==========================================
+ Hits         1848     1973     +125     
+ Misses        432      336      -96