Stop trying to exclude qcodes from Spyder UMR

[jenshnielsen]

• Stop calling add_to_spyder_UMR_excludelist automatically and deprecate this function.
• Document that users should disable UMR when installing qcodes editable.

• Breaking change note

Alternative to #6544

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 69.34%. Comparing base (bd2b3e7) to head (70a19c9).
Report is 20 commits behind head on main.

Files with missing lines	Patch %	Lines
src/qcodes/utils/spyder_utils.py	0.00%	3 Missing ⚠️
src/qcodes/utils/helpers.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6647      +/-   ##
==========================================
- Coverage   69.37%   69.34%   -0.03%     
==========================================
  Files         340      340              
  Lines       31293    31296       +3     
==========================================
- Hits        21708    21703       -5     
- Misses       9585     9593       +8     

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