extensions: fix neon-extension issues for core22

[sergiusens]

• moved back to the full blown command-chain for KDE Neon

• removed dependency on bindtextdomain

• updated the pattern match for kde sdk snaps

• tests updated to consider core22

• fixed the added part names

• Have you followed the guidelines for contributing?

• Have you signed the CLA?

• Have you successfully run make lint?

• Have you successfully run pytest tests/unit?

---

[mr-cal]

Looks good to me!

Not sure why the tests have been queued for 30 minutes

[lengau]

LGTM

[lengau]

@mr-cal to answer your question: We have a bunch of old tests still running. I'm guessing it's because of my if: always() on the tox workflow for uploading test results. I'll do a quick PR to fix that across all of our apps

[lengau]

The lint issues are fixed in #4059

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (hotfix/7.3@1914eb9). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head 0485f16 differs from pull request most recent head 33e679e. Consider uploading reports for the commit 33e679e to get more accurate results

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@@              Coverage Diff              @@
##             hotfix/7.3    #4060   +/-   ##
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  Coverage              ?   91.80%           
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  Files                 ?       79           
  Lines                 ?     5299           
  Branches              ?        0           
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  Hits                  ?     4865           
  Misses                ?      434           
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