chore: Add newsletter to bottom banner (SCE-29)

[kaloster]

Re-activated Newsletter signup in bottom banner for GE, CG and DE
Added e2e test
Added analytics + plausible
Updated Privacy Policy
Added doNotTrack for hubspot

[github-actions]

Deployment Summary

• backend_url: https://pr-7344-backend.rdev.single-cell.czi.technology
• backend_de_url: https://pr-7344-backend-de.rdev.single-cell.czi.technology
• backend_wmg_url: https://pr-7344-backend-wmg.rdev.single-cell.czi.technology
• frontend_url: https://pr-7344-frontend.rdev.single-cell.czi.technology
• delete_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-7344-deletion:1
• migrate_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-7344-migration:1

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.93%. Comparing base (a12556f) to head (a370849).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7344      +/-   ##
==========================================
- Coverage   92.93%   92.93%   -0.01%     
==========================================
  Files         194      194              
  Lines       16822    16822              
==========================================
- Hits        15634    15633       -1     
- Misses       1188     1189       +1     

Flag	Coverage Δ
unittests	92.93% <ø> (-0.01%)	⬇️

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[tihuan]

LGTM!! Thanks for adding it back 🎉