[FIX] python-framework.sh: Fix 'Current' symlink creation

[ales-erjavec]

Issue

From #3370 (comment)

It looks to me that the python-framework.py script would create a new symlink inside the Current folder if the symlink already exists.

This is exactly what happens

Description of changes

Do not follow target if it already exists and points to a directory

Includes

• Code changes
• Tests
• Documentation

[codecov]

Codecov Report

Merging #3373 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3373      +/-   ##
==========================================
- Coverage   82.25%   82.25%   -0.01%     
==========================================
  Files         351      351              
  Lines       62450    62450              
==========================================
- Hits        51371    51367       -4     
- Misses      11079    11083       +4