- Use the lowered 32-bit signature when linking the inlined and caller
  graphs.
- Tolerate non-projection uses of Call nodes when linking the graphs.
  These can be left over by Int64Lowering.
- Drive-by: Inline really small functions even if their call count is
  low.

Bug: v8:12166
Change-Id: I5b472d3f617f2f23820a5d142102c0a6c5c769dc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3720715Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81386}