feat(demo-mode): artifact bundle sync

[obostjancic]

• Closes: https://github.com/getsentry/projects/issues/311

[codecov]

Codecov Report

Attention: Patch coverage is 93.10345% with 10 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/sentry/demo_mode/tasks.py	81.13%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #86302      +/-   ##
==========================================
- Coverage   87.85%   87.85%   -0.01%     
==========================================
  Files        9733     9735       +2     
  Lines      552078   552255     +177     
  Branches    21533    21533              
==========================================
+ Hits       485018   485172     +154     
- Misses      66674    66697      +23     
  Partials      386      386              

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ ValueError: Field 'id' expected a number but got ''. sentry.demo_mode.tasks.sync_artifact_bundles View Issue
• ‼️ IntegrityError: UniqueViolation('duplicate key value violates unique constraint "sentry_fileblobowner_blob_id_78037767e8554f2_uniq"\nDETAIL: Key (blob_id, organization_id)=(9781432642, 4508121592102912) already exists.\n') sentry.demo_mode.tasks.sync_artifact_bundles View Issue

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