feat: additional APIs to support "actual select all" functions [ET-238]

[jesse-amano-hpe]

Ticket

Supports ET-238 with resources we missed in planning

Description

Fixes a couple bugs in bulk KillSearches, adds CancelSearches and LaunchTensorboardSearches

Test Plan

With the rest of ET-238, user should be able to select all searches matching a filter in the Web UI with a "true select all button", then perform bulk actions including "cancel" and "launch Tensorboard" and have them apply to all searches that match the filter even if they are not displayed on the current page view.

Checklist

• Changes have been manually QA'd
• New features have been approved by the corresponding PM
• User-facing API changes have the "User-facing API Change" label
• Release notes have been added as a separate file under docs/release-notes/
  See Release Note for details.
• Licenses have been included for new code which was copied and/or modified from any external code

[codecov]

Codecov Report

Attention: Patch coverage is 69.44444% with 33 lines in your changes missing coverage. Please review.

Project coverage is 54.54%. Comparing base (22ad457) to head (f22e852).
Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
master/internal/api_searches.go	69.44%	33 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10102      +/-   ##
==========================================
+ Coverage   54.49%   54.54%   +0.04%     
==========================================
  Files        1267     1267              
  Lines      159437   159499      +62     
  Branches     3637     3636       -1     
==========================================
+ Hits        86885    86997     +112     
+ Misses      72419    72369      -50     
  Partials      133      133              

Flag	Coverage Δ
backend	45.88% <69.44%> (+0.15%)	⬆️
harness	72.55% <ø> (ø)
web	54.02% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
master/internal/api_searches.go	78.12% <69.44%> (+23.23%)	⬆️

... and 8 files with indirect coverage changes

[netlify]

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[EmilyBonar]

Thanks for the assist!