[liftoff] Remove some binop macros

This inlines the first set of macros in order reduce an unneccessary
layer of abstraction. This makes the code easier to read and to debug.

R=zhin@chromium.org

Bug: v8:10364
Change-Id: Ia8ccb90c285c365ae5b3d52b6b6912ad1a76d81d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2129532
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66945}