fix: Add noindex meta tag for private collections (VC-2245)

[kaloster]

Reason for Change

• VC-2245 Private Collection is currently public via Google indexing
• Ensure private collections are not being indexed by search engines

Changes

• Added noindex meta tag to Collection page if collection.visibility == "PRIVATE"

Testing steps

• In rdev - inspect page source while viewing a private collecation

[github-actions]

Deployment Summary

• backend_url: https://pr-7486-backend.rdev.single-cell.czi.technology
• backend_de_url: https://pr-7486-backend-de.rdev.single-cell.czi.technology
• backend_wmg_url: https://pr-7486-backend-wmg.rdev.single-cell.czi.technology
• frontend_url: https://pr-7486-frontend.rdev.single-cell.czi.technology
• delete_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-7486-deletion:1
• migrate_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-7486-migration:1

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.06%. Comparing base (702c718) to head (40cdb9b).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7486   +/-   ##
=======================================
  Coverage   93.06%   93.06%           
=======================================
  Files         194      194           
  Lines       16833    16833           
=======================================
  Hits        15666    15666           
  Misses       1167     1167           

Flag	Coverage Δ
unittests	93.06% <ø> (ø)

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