Fix ts() namespace in searchKit & afform extensions

[colemanw]

Overview

Ensures all translatable strings in SearchKit & Afform extensions are translated using the extension namespace.

Before

Translatable strings not namespaced.

After

Fixed.

Comments

Also a little minor code cleanup in this PR.

[civibot]

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[mlutfy]

Cross-referencing previous discussions on core-ext gettext namespacing/domains:
https://lab.civicrm.org/dev/translation/-/issues/52

I'm 👍 on merging this.

[colemanw]

Sounds like this is merge-ready.

[seamuslee001]

@colemanw can you please rebase this?

[mlutfy]

jenkins, test this please

api_v3_SyntaxConformanceTest::testCreateSingleValueAlter with data set #82 ('UFField')
Failure in api call for UFField create:  Undefined index: type

[colemanw]

That's an unrelated fail that happens from time to time.

[mlutfy]

yay 🎉 thanks @colemanw