This CL adds a ToObject_Inline CSA macro that avoids the "ToObject"
builtin call if the passed argument is already a JSReceiver.

The CL also replaces all occurences of ToObject in Torque code with
ToObject_Inline.

R=jgruber@chromium.org

Change-Id: I1cd66d5d51dde5a93d9a0c55489b13a6f4ba9dc2
Reviewed-on: https://chromium-review.googlesource.com/1169819
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55039}