Deprecate Trial.runner

[eonofrey]

Summary: Upstream functionality from MultiTypeExperiment._runner_by_trial_type

Full details in: T222906773 and doc, but a summary is:

{F1982739301}

Differential Revision: D83001393

[meta-codesync[bot]]

@eonofrey has exported this pull request. If you are a Meta employee, you can view the originating Diff in D83001393.

[codecov-commenter]

Codecov Report

:x: Patch coverage is 96.05263% with 3 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 96.52%. Comparing base (6ada350) to head (ce8aef8).

Files with missing lines	Patch %	Lines
ax/core/base_trial.py	80.00%	3 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4460      +/-   ##
==========================================
- Coverage   96.52%   96.52%   -0.01%     
==========================================
  Files         563      563              
  Lines       58836    58834       -2     
==========================================
- Hits        56792    56788       -4     
- Misses       2044     2046       +2     

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[meta-codesync[bot]]

This pull request has been merged in facebook/Ax@1f758520e0195dded019ab982819987dba5f6e91.