Combines several individual pushes/pops into a single call to Push in
GenerateTailCallToReturnedCode. This saves a single instruction since
pushes in descending register order can be be merged into a single
instruction. The pop merge doesn't save anything but is done for
consistency.

Bug: v8:9771
Change-Id: I67084985ef5b7b2ed2fc73faedbb0bd9c50e6df6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1868612
Commit-Queue: Dan Elphick <delphick@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Auto-Submit: Dan Elphick <delphick@chromium.org>
Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64382}