feat: upgrade to Solr 9, fixes #48

[bserem]

The Issue

• SOLR 8 is EOL, check update to SOLR 9 #48

SOLR 8 is EOL

How This PR Solves The Issue

Upgrades to SOLR 9

Manual Testing Instructions

ddev add-on get https://github.com/ddev/ddev-drupal-solr/tarball/solr9
ddev restart
ddev launch :8943

Automated Testing Overview

Related Issue Link(s)

• https://solr.apache.org/news.html#solr-8-reaches-end-of-life

Release/Deployment Notes

[rfay]

ddev-drupal-solr is also EOL :) Consider ddev-solr, https://github.com/ddev/ddev-solr

And it has a way to change the solr version, https://github.com/ddev/ddev-solr?tab=readme-ov-file#using-alternate-versions-of-solr

[bserem]

Sadly it is (still) unclear to me whether platform.sh is running SOLR 9 in cloud mode or not. There is nothing in their docs. That's the main reason we are continuing to use ddev-drupal-solr.

I'll try to get an answer for this once time allows

[rfay]

If you want to update this to Solr 9, consider the technique in ddev-solr, with the supported .env.solr technique.

[rfay]

You really need to do something like that, because IIRC Acquia has just upgraded to Solr 7 ?

[bserem]

I am not aware of what Acquia uses, I don't maintain any projects there.

Platform.sh support 8.11 and 9, but no details about cloud mode.

[rfay]

Check into their discord and see if you get some info. You should also be able to platform ssh and explore what their setup is.

[stasadev]

Rebased.