ref: handle AnonymousUser in some views

[asottile-sentry]

this is needed to upgrade django-stubs. I think in every place here these are superfluous but are helpful to teach the type checker what is going on

[codecov]

Codecov Report

Attention: Patch coverage is 53.57143% with 39 lines in your changes missing coverage. Please review.

⚠️ Parser warning

The parser emitted a warning. Please review your JUnit XML file:

Warning while parsing testcase attributes: Limit of string is 1000 chars, for name, we got 2083 at 1:157237 in /home/runner/work/sentry/sentry/.artifacts/pytest.junit.xml

Files with missing lines	Patch %	Lines
src/sentry/relocation/api/endpoints/index.py	57.14%	3 Missing ⚠️
...rc/sentry/api/endpoints/accept_project_transfer.py	66.66%	2 Missing ⚠️
src/sentry/api/endpoints/api_authorizations.py	50.00%	2 Missing ⚠️
src/sentry/api/endpoints/assistant.py	50.00%	2 Missing ⚠️
src/sentry/api/endpoints/broadcast_index.py	60.00%	2 Missing ⚠️
...ntry/api/endpoints/organization_pinned_searches.py	50.00%	2 Missing ⚠️
...rc/sentry/api/endpoints/trace_explorer_ai_query.py	0.00%	2 Missing ⚠️
...rc/sentry/api/endpoints/trace_explorer_ai_setup.py	0.00%	2 Missing ⚠️
.../sentry/explore/endpoints/explore_saved_queries.py	50.00%	2 Missing ⚠️
...ssues/endpoints/organization_group_search_views.py	50.00%	2 Missing ⚠️
... and 17 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #91884      +/-   ##
==========================================
- Coverage   87.62%   87.62%   -0.01%     
==========================================
  Files       10357    10355       -2     
  Lines      586880   586956      +76     
  Branches    22585    22585              
==========================================
+ Hits       514250   514291      +41     
- Misses      72202    72237      +35     
  Partials      428      428