[X86] Handle localdynamic TLS model in x32 mode

D92346 added TLS_(base_)addrX32 to handle TLS in x32 mode, but missed the
different TLS models. This diff fixes the logic for the local dynamic model
where `RAX` was used when `EAX` should be, and extends the tests to cover
all four TLS models.

Fixes https://bugs.llvm.org/show_bug.cgi?id=26472.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D92737