authz: fix broken ReposIDsWithOldestPerms when repo is hard-deleted

[unknwon]

Instead of checking if repository is not in the list of soft-deleted, we now check the repository is not deleted.

This prevents scheduler trying to sync permissions for hard-deleted repositories. Such scenario is not usual (DB is manually modified) but noticed this is causing problems on my dev instance.

Fixes #11769

[codecov]

Codecov Report

Merging #11770 into master will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #11770      +/-   ##
==========================================
- Coverage   47.68%   47.67%   -0.01%     
==========================================
  Files        1402     1402              
  Lines       79752    79752              
  Branches     6622     6721      +99     
==========================================
- Hits        38027    38023       -4     
- Misses      38151    38153       +2     
- Partials     3574     3576       +2     

Flag	Coverage Δ
#go	51.83% <100.00%> (-0.01%)	⬇️
#storybook	10.11% <ø> (ø)
#typescript	36.61% <ø> (ø)
#unit	47.27% <100.00%> (-0.01%)	⬇️

Impacted Files	Coverage Δ
enterprise/cmd/frontend/db/perms_store.go	78.59% <100.00%> (ø)
.../internal/codeintel/resolvers/graphql/locations.go	83.63% <0.00%> (-3.64%)	⬇️