[X86][Inline] Skip inline asm in inlining target feature check (#83820)

When inlining across functions with different target features, we
perform roughly two checks:
 1. The caller features must be a superset of the callee features.
2. Calls in the callee cannot use types where the target features would
change the call ABI (e.g. by changing whether something is passed in a
zmm or two ymm registers). The latter check is very crude right now.

The latter check currently also catches inline asm "calls". I believe
that inline asm should be excluded from this check, as it is independent
from the usual call ABI, and instead governed by the inline asm
constraint string.

Fixes https://github.com/llvm/llvm-project/issues/67054.