Fixes for star bundle 2022.02

The 2022.02 bundle seems to be broken in the following ways:

There is a typo for the nqp version in etc/fetch_core.txt it should read nqp_version=2022.02
TheMIME-Base64 module is missing from src/rakudo-star-modules in the generated tarball
JSON-OptIn and Perl6-PathTools are missing from both etc/modules.txt and src/rakudo-star-modules
On macOS a fix is required for setting a valid locale in the install script

rakudo / star