lint: Add std::locale::global to list of locale dependent functions

Summary:

We currently flag setlocale(...) as locale dependent, but prior to this commit we didn't flag
std::locale::global(...) as such.

In addition to setting the global C++ locale std::locale::global(...) also does the equivalent
of std::setlocale(LC_ALL, ...);.

Thus the functionality of std::locale::global(...) is a superset of setlocale(...) :)

This is a backport of core#18649

Test Plan: arc lint --everything

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D9977