scripted-diff: Use C.UTF-8 locale in all shell scripts

There is no reason to avoid it nowadays.

-BEGIN VERIFY SCRIPT-

sed -i "s/\<export LC_ALL=C\>/export LC_ALL=C.UTF-8/g" \
 $( git grep -l "^export LC_ALL=C$" -- ':!src/ipc/libmultiprocess' ':!src/minisketch' ':!src/secp256k1' )

-END VERIFY SCRIPT-

cmake/script/macos_zip.sh

@@ -3,7 +3,7 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or https://opensource.org/license/mit/.
 
-export LC_ALL=C
+export LC_ALL=C.UTF-8
 
 if [ -n "$SOURCE_DATE_EPOCH" ]; then
   find . -exec touch -d "@$SOURCE_DATE_EPOCH" {} +