Port 407317a2

Original Commit Message:

    - Convert Builtin to enum class
    - Change int-based builtin_index methods to use Builtin
    - Change Builtins::builtin to Builtins::code

R=cbruni@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: Ic92eeea4a0d0aaf38d78a93bfbaac2bb10403dae
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2960908Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#75134}