wip - activity when feedback attachment is deleted

[ryan953]

relates to #67707

[github-actions]

🚨 Warning: This pull request contains Frontend and Backend changes!

It's discouraged to make changes to Sentry's Frontend and Backend in a single pull request. The Frontend and Backend are not atomically deployed. If the changes are interdependent of each other, they must be separated into two pull requests and be made forward or backwards compatible, such that the Backend or Frontend can be safely deployed independently.

Have questions? Please ask in the #discuss-dev-infra channel.

[codecov]

Bundle Report

Changes will decrease total bundle size by 246 bytes ⬇️

Bundle name	Size	Change
sentry-webpack-bundle-array-push	26.17MB	246 bytes ⬇️

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 79.82%. Comparing base (30a576c) to head (7c126ad).

❗ Current head 7c126ad differs from pull request most recent head 46de2ab. Consider uploading reports for the commit 46de2ab to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #68468       +/-   ##
===========================================
+ Coverage   52.72%   79.82%   +27.09%     
===========================================
  Files        6473     6477        +4     
  Lines      287831   287929       +98     
  Branches    49611    49623       +12     
===========================================
+ Hits       151759   229832    +78073     
+ Misses     135513    57705    -77808     
+ Partials      559      392      -167     

Files	Coverage Δ
...c/sentry/api/endpoints/event_attachment_details.py	84.72% <100.00%> (+49.00%)	⬆️
src/sentry/types/activity.py	100.00% <100.00%> (ø)
static/app/types/group.tsx	73.68% <ø> (ø)
...tatic/app/views/issueDetails/groupActivityItem.tsx	54.40% <0.00%> (-0.44%)	⬇️

... and 2886 files with indirect coverage changes

[aliu39]

Split up to #69878 and #69880