ref: Remove unused features ( back-end)

[RaduW]

This PR removes the following irrelevant features from getsentry.
This is the back-end part of the removal

organizations:mobile-app
organzations:metrics
organizations:dynamic-sampling-transaction-name-priority
organizations:open-ai-suggestion
organizations:onboarding-project-loader
organizations:artifact-bundles

Resolves: #58682

[codecov]

Codecov Report

Merging #58703 (f0721c2) into master (10a74ab) will decrease coverage by 0.01%.
Report is 5 commits behind head on master.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master   #58703      +/-   ##
==========================================
- Coverage   80.74%   80.74%   -0.01%     
==========================================
  Files        5164     5164              
  Lines      225768   225766       -2     
  Branches    38008    38008              
==========================================
- Hits       182302   182286      -16     
- Misses      37940    37947       +7     
- Partials     5526     5533       +7     

Files	Coverage Δ
src/sentry/apidocs/examples/project_examples.py	100.00% <ø> (ø)
src/sentry/conf/server.py	89.88% <ø> (ø)
src/sentry/features/__init__.py	100.00% <ø> (ø)
static/app/components/compactSelect/control.tsx	91.86% <ø> (ø)
static/app/components/dropdownMenu/index.tsx	86.04% <ø> (-0.32%)	⬇️
static/app/views/discover/table/cellAction.tsx	92.18% <ø> (ø)
src/sentry/api/endpoints/event_ai_suggested_fix.py	60.54% <50.00%> (ø)

... and 11 files with indirect coverage changes