DM-46845 Stop support for execution butler for remote job submission

[zhaoyuyoung]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.87%. Comparing base (645c201) to head (0121dd5).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #73   +/-   ##
=======================================
  Coverage   28.87%   28.87%           
=======================================
  Files           9        9           
  Lines         710      710           
  Branches      128      113   -15     
=======================================
  Hits          205      205           
- Misses        495      496    +1     
+ Partials       10        9    -1     

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[MichelleGower]

A comment about the changes file. Also, shouldn't the executionButler lines (and comments) be removed from the config/*.yaml files? After addressing these things, merge is approved.

[MichelleGower]

towncrier notes should be in past tense (e.g., Removed or Stopped)

[zhaoyuyoung]

Thanks for the review. I've addressed this one and the configuration yamls.