Register printing under --trace-ignition used register operands to
decide which register to print. But, for short Star bytecodes (Star1,
Star2, etc) the register is implicit in the bytecode. Add support for
these.

Change-Id: I788ffd729e251f2c8795b5660ac773329502bb5e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3283071
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77922}