Revert "chore: Deprecate same_process_as_parent (#4244)"

[sentrivana]

This reverts commit e05ed0a.

same_process_as_parent is True by default, so we actually don't have a way of detecting whether this was set explicitly by the user or not.

Removing the deprecation altogether -- no one's using this.

Closes #4289

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.50%. Comparing base (296e288) to head (4ecd5a1).
Report is 1 commits behind head on master.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4290      +/-   ##
==========================================
- Coverage   79.54%   79.50%   -0.05%     
==========================================
  Files         142      142              
  Lines       15907    15905       -2     
  Branches     2722     2721       -1     
==========================================
- Hits        12654    12645       -9     
- Misses       2389     2394       +5     
- Partials      864      866       +2     

Files with missing lines	Coverage Δ
sentry_sdk/tracing.py	77.73% <ø> (+0.11%)	⬆️

... and 3 files with indirect coverage changes

[antonpirker]

ok