Simplify WNP templates

[janbrasna]

One-line summary

Moves the boilerplate ceremony to just base template, making sure the default metas are always used at least as a fallback.

Significant changes and points to review

For consistency/simplicity, this also changes:

• all FXDE WNPs and firstrun have navbar (site_header) removed now, too;
• adds meta description to nightly, repurposing one of the content headings;
• deletes old font variants from WNP114 that's been removed;
• links current (short) fx logos from img/logos where they're now available.

Issue / Bugzilla link

Resolves #14949
Refs #14720 (comment)
Refs #14822 (comment)

Testing

http://localhost:8000/en-US/firefox/131.0/whatsnew/?branch=experiment-wnp-131-tabs&variant=v1
http://localhost:8000/en-CA/firefox/131.0/whatsnew/?branch=experiment-wnp-131-tabs&variant=v2
http://localhost:8000/en-GB/firefox/131.0/whatsnew/?branch=experiment-wnp-131-tabs&variant=v3 http://localhost:8000/de/firefox/131.0/whatsnew/?branch=experiment-wnp-131-tabs&variant=v4
http://localhost:8000/es-ES/firefox/130.0/whatsnew/
http://localhost:8000/en-CA/firefox/129.0/whatsnew/
http://localhost:8000/en-GB/firefox/129.0/whatsnew/
http://localhost:8000/en-US/firefox/128.0/whatsnew/?branch=experiment-wnp-128-na-pip&variant=v1
http://localhost:8000/en-US/firefox/128.0/whatsnew/
http://localhost:8000/pl/firefox/128.0/whatsnew/?v=1
http://localhost:8000/de/firefox/128.0/whatsnew/?v=2
http://localhost:8000/fr/firefox/128.0/whatsnew/?v=3
http://localhost:8000/en-CA/firefox/127.0/whatsnew/
http://localhost:8000/it/firefox/127.0/whatsnew/
http://localhost:8000/en-US/firefox/126.0/whatsnew/
http://localhost:8000/it/firefox/126.0/whatsnew/
http://localhost:8000/en-CA/firefox/126.0beta/whatsnew/
http://localhost:8000/de/firefox/126.0beta/whatsnew/
http://localhost:8000/en-US/firefox/125.0/whatsnew/
http://localhost:8000/es-ES/firefox/125.0/whatsnew/
http://localhost:8000/firefox/66.6/whatsnew/
http://localhost:8000/en-US/firefox/99.0a1/whatsnew/
http://localhost:8000/en-US/firefox/102.0a2/whatsnew/
http://localhost:8000/en-US/firefox/92.0a2/whatsnew/
http://localhost:8000/en-US/firefox/83.0a2/firstrun/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.88%. Comparing base (2179c6e) to head (a0225e7).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #14936   +/-   ##
=======================================
  Coverage   77.88%   77.88%           
=======================================
  Files         163      163           
  Lines        8480     8480           
=======================================
  Hits         6605     6605           
  Misses       1875     1875           

☔ View full report in Codecov by Sentry.
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[janbrasna]

Notes for reviewer:

[janbrasna]

Basically the page_og_desc is only worth setting if it should differ from page_desc, otherwise self.page_desc() in base template takes care of that:

bedrock/bedrock/base/templates/base-protocol.html

Line 39 in 2656cbd

<meta property="og:description" content="{% filter striptags %}{% block page_og_desc %}{{ self.page_desc() }}{% endblock %}{% endfilter %}">

so setting page_desc properly is sufficient.

[janbrasna]

(This is the current -v2 string so that's now used in base and as a result these titles get also translated now…)

[janbrasna]

This now makes aurora in-product pages aligned with release/beta and nightly in a way that it doesn't show the main site header and navigation (wnp implicitly from the base diff here, firstrun explicitly on this line).

I've open #14949 for extra visibility.

[janbrasna]

Updated to include WNP 130–131 now, too.

[stephaniehobson]

R+ This looks great. Clean and through as always. Nice code cleanup.

@janbrasna In the opening comment you mention needed to add 131 nimbus URLs and further down you say 131 is done. Does that mean the 131 nimbus experiments are done too?

[janbrasna]

@stephaniehobson That's a good catch! The template is covered, only at the time of the WIP comment there was a little bit of fiddling with the experiments vs. defaults/fallback etc. but this should be all sorted out now and I've included a bunch of experiment branches across regions in the testing links (which was the only thing missing — I never remember how the nimbus branches go into the query string;D…)