This CL enables regexp interpreter and tier-up to the compiler after one
execution by setting the --regexp-tier-up flag to true by default. The
number of times a regexp is interpreted before tiering-up is controlled
by the --regexp-tier-up-ticks flag which is already set to 1 by default.

Change-Id: I79ff7fcd159f50f2f5351b339d8ffb21af039a86
Bug: v8:9566
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1816501Reviewed-by: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Ana Pesko <anapesko@google.com>
Cr-Commit-Position: refs/heads/master@{#63905}