Update AUR package to 0.22.1

Summary:
Also includes a few improvements:

• Declare bitcoin-wallet as a provided binary for the qt package (which has the wallet enabled).
• Use the ninja install/strip rule rather than installing each component individually now that secp256k1 is no longer installed by default.
• Reenable ninja check which is now fixed (used to segfault due to setlocale).

Depends on D7305 and D7306.

Test Plan:
Comment out the git push line in the update-aur.sh script, and run
it as root:

./update-aur bitcoin-abc
./update-aur bitcoin-abc-qt

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Subscribers: deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D7307