The CodeStubAssembler's BitwiseOp method used by the interpreter and Number
related builtins would unconditionnaly mask the shift amount operand with
0x1f. However some targets' shift implementation may already do it.

This removes 24 `and` instructions from the snapshot on Arm64.

Bug: 
Change-Id: If0a720c7ea69fea46c9b31dd55903603f058d481
Reviewed-on: https://chromium-review.googlesource.com/765971Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Pierre Langlois <pierre.langlois@arm.com>
Cr-Commit-Position: refs/heads/master@{#49371}