Add UK influencer campaign page (Fixes #15841)

[alexgibson]

One-line summary

• Adds a UK influencer campaign landing page at /firefox/landing/tech/.

Significant changes and points to review

• Page is identical to /firefox/new/ except:
  • It serves a custom Firefox build for both Windows and macOS users (links updated via JS).
  • Download buttons trigger direct downloads (not through the /thanks/ page).
  • Page is /en-GB/ only.
  • Page contains a noindex meta tag.

Issue / Bugzilla link

#15841

Testing

http://localhost:8000/en-GB/firefox/landing/tech/

• MacOS desktop download buttons should download custom build (partner-firefox-release-smi-smi-001-latest)
• Windows desktop download buttons should download partner-firefox-release-smi-smi-001-stub.
• Download buttons trigger direct downloads (not through the /thanks/ page).
• Page is /en-GB/ only.
• Page contains a noindex meta tag.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.29%. Comparing base (eefdbfa) to head (d5f9034).
Report is 14 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #15858   +/-   ##
=======================================
  Coverage   79.28%   79.29%           
=======================================
  Files         159      159           
  Lines        8343     8347    +4     
=======================================
+ Hits         6615     6619    +4     
  Misses       1728     1728           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[alexgibson]

Production bouncer links are now live, so this should be code complete. Just waiting on legal to give final sign off.

[stephaniehobson]

Note to self: I need to look and see what GA4 does with this. IIRC it uses the URL to tell the release channels apart.

[stephaniehobson]

Some one letter/word tweaks for legibility, NBD.

And a question... how do we want these tracked in GA4? At the moment they are not triggering a firefox_download and are passing some weird params to product_download because the script expects values in the download URL.

[alexgibson]

And a question... how do we want these tracked in GA4? At the moment they are not triggering a firefox_download and are passing some weird params to product_download because the script expects values in the download URL.

Good catch. - I think we can consider partner distribution builds like regular release channel Firefox downloads. They are only triggered from specific pages, so I don't think there's any need to create a new download event category for them. I'll add some logic so they trigger a regular firefox_download event.

[alexgibson]

@stephaniehobson thanks for the review, updated

[maureenlholland]

r+ 🎉 fix commit looks good to me