The laneidx of LoadLaneParameters will be taken as char type when
PrintParameter. Fix operator<< to print laneidx with integer type.

Change-Id: Ibe9992326014d912f9aa09e785c8c3632ed02c06
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3878768
Auto-Submit: Yolanda Chen <yolanda.chen@intel.com>
Commit-Queue: Yolanda Chen <yolanda.chen@intel.com>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83022}