[X86] Add test case to show fast-isel incorrectly emitting a 64-bit movabsq...

[X86] Add test case to show fast-isel incorrectly emitting a 64-bit movabsq instruction in 32-bit mode when using constant pools with -code-model=large. NFC

-code-model=large isn't supposed to mean anything to 32-bit mode.
But nothing prevents passing it so we shouldn't generate bad code
if someone does.