fix(stats): hide stats if no project access

[oioki]

Second attempt of #80447

Comparing with the previous attempt, we now also allow project stats for staff users (or user.is_staff).

The superuser case is already covered in this code:

sentry/src/sentry/api/serializers/models/project.py

Lines 131 to 136 in 2e5e065

	has_access = bool(
	is_member
	or is_superuser
	or project.organization.flags.allow_joinleave
	or (org_role and roles.get(org_role).is_global)
	)

is_superuser is True, therefore has_access is True, and the first condition in this snippet works:

if attrs["has_access"] or user.is_staff:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #81162   +/-   ##
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  Coverage   80.33%   80.34%           
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  Files        7223     7223           
  Lines      320107   320060   -47     
  Branches    20779    20772    -7     
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- Hits       257163   257140   -23     
+ Misses      62551    62527   -24     
  Partials      393      393