This CL fixes comparison operations that take into account full-word
value instead of the lower 32 bits and tweaks some CSA helper functions
for smi-corrupting decompression.

Bug: v8:9706
Change-Id: I50e38a9f34b911ec0b8dd4e21298417bf23160aa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1824943Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63995}