To eliminate unnecessary move instructions from register to fixed register. We check the fixed register hint for operands in move gaps
when building LiveRanges. If a to_operand has a hint_operand (with fixed register), then set the hint_operand for from_operand too. This can avoid the register allocator ignore hint information about fixed register.

Bug: v8:12909
Change-Id: I17f9afa484ee08de8ac1ab42945caba2c362fc9e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3669019Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Jialu Zhang <jialu.zhang@intel.com>
Cr-Commit-Position: refs/heads/main@{#80844}