Update translation source file for v25.0 string freeze

[hebasto]

This PR updates the src/qt/locale/bitcoin_en.xlf translation source file according to Release schedule for 25.0.

Some translation-related fixes have been picked from #599 and #716.

Note for reviewers: it is expected to get a zero diff after running make -C src translate locally.

[DrahtBot]

The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

Reviews

See the guideline for information on the review process.

Type	Reviewers
ACK	jarolrod

If your review is incorrectly listed, please react with 👎 to this comment and the bot will ignore it on the next update.

Conflicts

Reviewers, this pull request conflicts with the following ones:

• #716 (Adjust plural forms for translations by hebasto)
• #bitcoin/bitcoin/27375 (net: support unix domain sockets for -proxy by pinheadmz)
• #bitcoin/bitcoin/26699 (wallet, gui: bugfix, getAvailableBalance skips selected coins by furszy)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

[hebasto]

cc @luke-jr @furszy @jarolrod

[jarolrod]

ACK e414edd

Went through the translation process again, confirming that plurals requires manual intervention in the translation source file.

I have a zero-diff with this branch after following the process steps.