Update the formatter day tests to the new style.
Other test will be done separately.
Reviewed By: #libc, ldionne
Differential Revision: https://reviews.llvm.org/D134031
Instead of mentioning tm directly in the definition of __convert_to_tm,
take it as a template argument. As a fly-by also fix incorrect Lit feature
(should have been no-localization instead of libcpp-has-no-localization).
Differential Revision: https://reviews.llvm.org/D133490