For very long subject strings, the regexp interpreter is currently much slower
than the native machine code execution. This CL implements eager tier-up to the
compiler to avoid the performance penalty for subject strings of length greater
than 1000.

Change-Id: I244ccbd60255e0f3bedc493b1cc3d25cdd42133e
Bug: v8:9566
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1829273Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Ana Pesko <anapesko@google.com>
Cr-Commit-Position: refs/heads/master@{#64046}