Generate sitemaps and fix robots.txt path for analytics

[carkod]

Done

• Moved robots.txt to root folder
• Generate sitemaps for engage pages.

QA

• https://ubuntu-com-13043.demos.haus/robots.txt Should 200 if you curl it (previously it was redirecting, you can check in prod)
• https://ubuntu-com-13043.demos.haus/engage/sitemap.xml should return now all links for engage pages

Issue / Card

Fixes https://warthogs.atlassian.net/browse/WD-5037?atlOrigin=eyJpIjoiOWVjYjBiZjcyYzlhNDRjODkzZGVjOGU1ZTZlYzg5ZTQiLCJwIjoiaiJ9

[webteam-app]

Demo starting at https://ubuntu-com-13043.demos.haus

[codecov]

Codecov Report

Merging #13043 (eba196d) into main (76281b1) will not change coverage.
The diff coverage is n/a.

❗ Current head eba196d differs from pull request most recent head 8a9406e. Consider uploading reports for the commit 8a9406e to get more accurate results

@@           Coverage Diff           @@
##             main   #13043   +/-   ##
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  Coverage   74.90%   74.90%           
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  Files         107      107           
  Lines        2873     2873           
  Branches      928      928           
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  Hits         2152     2152           
  Misses        699      699           
  Partials       22       22           

[carkod]

Reviewed by @caldav

[mtruj013]

LGTM