feat(profiling): reverse profile_session start/stop methods deprecation

[viglia]

Revert back to using start_profiler and stop_profiler function names and deprecate the *_session ones instead.

Prior PR that introduced the change we're undoing: #4056

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 79.52%. Comparing base (bc54a1d) to head (5807ca6).
Report is 4 commits behind head on master.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
sentry_sdk/profiler/continuous_profiler.py	75.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4162      +/-   ##
==========================================
- Coverage   79.57%   79.52%   -0.06%     
==========================================
  Files         141      141              
  Lines       15714    15714              
  Branches     2671     2671              
==========================================
- Hits        12505    12497       -8     
- Misses       2367     2376       +9     
+ Partials      842      841       -1     

Files with missing lines	Coverage Δ
sentry_sdk/profiler/__init__.py	100.00% <ø> (ø)
sentry_sdk/profiler/continuous_profiler.py	85.57% <75.00%> (ø)

... and 4 files with indirect coverage changes