[Inliner] Propagate SROA analysis through invariant group intrinsics

SROA can handle invariant group intrinsics, let the inliner know that
for better heuristics when the intrinsics are present.

This fixes size issues in a couple files when turning on
-fstrict-vtable-pointers in Chrome.

Reviewed By: rnk, mtrofin

Differential Revision: https://reviews.llvm.org/D100249