This replaces ebx usage in several more interface descriptors.

- IC descriptors already passed most arguments on the stack (updated
  their Register accessors to reflect that).
- The allocation site argument appears to be unused in the
  ConstructStub descriptor. It can probably be removed in a follow-up.

Drive-by: Rename ArgumentAdaptorDescriptor to
ArgumentsAdaptorDescriptor to match the builtin name.

Bug: v8:6666
Change-Id: I4cdf1775a5b4b74491d6d303c49a8af9b6cd3c03
Reviewed-on: https://chromium-review.googlesource.com/1195367
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55495}