gui: Stop translating PACKAGE_NAME

Summary:

• build: Stop translating PACKAGE_NAME
• scripted-diff: Avoid passing PACKAGE_NAME for translation

-BEGIN VERIFY SCRIPT-
sed -i --regexp-extended -e 's/\<\w+(::\w+)?\(PACKAGE_NAME\)/PACKAGE_NAME/g' $(git grep -l --extended-regexp '\<\w+(::\w+)?\(PACKAGE_NAME\)' src)
-END VERIFY SCRIPT-

• qt: Run «make translate» in ./src/
• util: No translation of Bitcoin Core in the copyright

This is a backport of Core PR16291

Depends on D5790

Test Plan:

make translate

It seems like I have parasites changes in there, so somethign may still be borken on my end.

Reviewers: #bitcoin_abc, jasonbcox, Fabien

Reviewed By: #bitcoin_abc, jasonbcox, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D5798