Have non-chunked translation of english generated as part of debbie's runs

[robe]

Somewhat related to #5429. This is to also generate the non-chunked version of the docs for english (in addition to the chunked we do).

So like we have ​https://postgis.net/docs/manual-3.4/postgis-ja.html

we'd also have a ​https://postgis.net/docs/manual-3.4/postgis-en.html

[Sandro Santilli <strk@…>]

In 578f3f9/git:

Reorganize html targets

• Non-chunked will be html/postgis-<lang>.html
• Chunked will be under html/postgis-<lang>/
• Chunked web will be under html/postgis-web-<lang>/
• Chunked web mobile will be under html/postgis-web-mobile-<lang>/
• Images (all shared) will be under html/images
• HTML install will honour —htmldir configure switch
• Add html-assets-install and html-assets-uninstall targets

References #5429
References #5430

[strk]

I believe the file to change to tweak that is ci/debbie/postgis_release_docs.sh

[strk]

One of the things that ci/debbie/postgis_release_docs.sh does is create a doc-html-$(VERSION).tar.gz package which currently contains non-chunked localized html files and chunked english-only file. Is it intentional for that package to contain all languages ?

[strk]

This is now working: ​https://postgis.net/docs/manual-3.4/postgis-en.html