[libc++][lit][AIX] Port tests for money format to AIX

Summary:
This patch ports libc++ LIT test cases for money formats to AIX. On AIX, the money format of locale zh_CN.UTF-8 is the similar to that of en_US.UTF-8, i.e., sign, symbol, none, value.

Reviewed by: Mordante, DiggerLin, libc++

Differential Revision: https://reviews.llvm.org/D128220