fix(aci): filter out non-alertable and broken sentry apps in available actions endpoint

[ameliahsu]

fixes 2 bugs that were causing the available actions endpoint to return more results than expected:

• we weren't filtering all sentry apps by is_alertable, causing the webhook action to return extra SentryAppServices that are not alertable
• we weren't calling prepare_ui_component on the sentry app components, causing us to return broken sentry apps that fail component preparation (see below)

  sentry/src/sentry/sentry_apps/models/sentry_app_installation.py

  Lines 255 to 256 in da98041

  	# TODO(nisanthan): For now, skip showing the UI Component if the API requests fail
  	return None

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #101866    +/-   ##
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  Coverage   80.98%    80.98%            
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  Files        8721      8728     +7     
  Lines      387858    388495   +637     
  Branches    24548     24548            
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+ Hits       314098    314623   +525     
- Misses      73415     73527   +112     
  Partials      345       345            

[GabeVillalobos]

Does this component preparation code make any network requests at all?

[GabeVillalobos]

Summarizing a conversation we had in Slack:
This potentially calls the downstream Sentry App's endpoint, which can add a ton of additional latency, or fallibility.

This is ok for now, but we should consider moving this call into its own API, and letting the UI make this call on-demand to retrieve just the UI component that it needs when the user selects the Sentry app as a target and has to configure it.

Additionally, this call is repeated in the serializer below, so we're removing that other call and hoisting it here for now while @ameliahsu works on the API and UI changes.

[getsantry]

This pull request has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you add the label WIP, I will leave it alone unless WIP is removed ... forever!

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"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀