deprecate(related_issues): Drop support for doing all types of related issues

[armenzg]

trafficstars

This is a follow-up to #70504. Once the UI stops using this approach we will merge this change.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 79.96%. Comparing base (f662031) to head (017eee0). Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #70606      +/-   ##
==========================================
+ Coverage   78.09%   79.96%   +1.87%     
==========================================
  Files        6501     6501              
  Lines      290464   290464              
  Branches    50044    50041       -3     
==========================================
+ Hits       226846   232278    +5432     
+ Misses      63251    57819    -5432     
  Partials      367      367              

Files	Coverage Δ
src/sentry/api/endpoints/issues/related_issues.py	100.00% <100.00%> (+29.16%)	:arrow_up:
src/sentry/issues/related/__init__.py	100.00% <ø> (+41.66%)	:arrow_up:

... and 436 files with indirect coverage changes

[sentry[bot]]

Suspect Issues

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

• ‼️ MultiValueDictKeyError: 'type' /api/0/issues/{issue_id}/related-issues/ View Issue

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[getsentry-bot]

PR reverted: 590910fd5a8062a5ee2f775eea56f1223c7bd695