chore(issues): Revert-revert of deleting streamline-targeting-context

[leeandher]

Revert-revert of #64876, with the addition of a bug fix caught in canary with #65104

The canary error came from refreshing the schemas after a ProjectOwnership is created, but then raw is set to None. Now it should accept None just fine, espcially since thats a valid value for that field on the model.

todo

• Add tests

[codecov]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (7dba2dc) 55.95% compared to head (72d43db) 81.44%.

❗ Current head 72d43db differs from pull request most recent head 7efd6a9. Consider uploading reports for the commit 7efd6a9 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #65160       +/-   ##
===========================================
+ Coverage   55.95%   81.44%   +25.49%     
===========================================
  Files        5242     5254       +12     
  Lines      231800   232126      +326     
  Branches    45455    45501       +46     
===========================================
+ Hits       129702   189064    +59362     
+ Misses      98000    37190    -60810     
- Partials     4098     5872     +1774     

Files	Coverage Δ
src/sentry/api/endpoints/codeowners/__init__.py	90.41% <100.00%> (+39.09%)	⬆️
src/sentry/api/endpoints/codeowners/index.py	94.33% <100.00%> (+46.97%)	⬆️
.../sentry/api/serializers/models/projectownership.py	100.00% <100.00%> (+9.52%)	⬆️
src/sentry/apidocs/examples/project_examples.py	100.00% <ø> (ø)
src/sentry/conf/server.py	88.18% <ø> (+0.16%)	⬆️
src/sentry/features/__init__.py	100.00% <ø> (ø)
src/sentry/models/projectcodeowners.py	88.50% <ø> (+37.93%)	⬆️
src/sentry/ownership/grammar.py	96.08% <100.00%> (+71.71%)	⬆️
src/sentry/api/endpoints/project_ownership.py	91.94% <83.33%> (+55.52%)	⬆️
...entry/integrations/slack/message_builder/issues.py	89.45% <57.14%> (+74.25%)	⬆️
... and 1 more

... and 1886 files with indirect coverage changes

[sentry-io]

Suspect Issues

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

• ‼️ Group.DoesNotExist: Group matching query does not exist. sentry.tasks.digests.deliver_digest View Issue

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