WordPress.org Plugin Support Forum Search powered by Google not working

[abitofmind]

Reproduction as of 2023-01-13:

1. Go to the support forum of any plugin, e.g. ​Redirection.
2. Look at the titles of the most recent threads on top.
3. Search for any words in those titles.

Expected: Should yield a result obviously.

Actually: No result at all.
→ People are less likely "to search before the type" then.
→ Higher probability for duplicate content in the support forums.
→ Overally frustrating for all parties involved.

Fixing this hopefully is a small effort for a big gain.

[abitofmind]

▶️ ​WordPress.org Plugin Forum Search not working (18sec video, 281 kB, Dropbox)

(for convenience, as this ancient issue tracker cannot show it inline, nor open it in a new tab, but only download it, yikes)

[Otto42]

We really didn't need the video. The problem is obviously that the search parameter is not going through to the query. I suspect it's something to do with the new search page.

Fixes https://meta.trac.wordpress.org/ticket/6679

Props <username>, <username>

### How to test the changes in this Pull Request:

1. Search from ​https://wordpress.org/support/plugin/redirection/ with a question mark included, or without..
2. Notice it doesn't quite work right, but looks like it does
3. Apply patch.
4. Perform search again, notice the ? is kept, and that intext:... is included.

[dd32]

Fixed via above PR.