This removes the relocation mode and code specialization for table
sizes. These are now stored in the context and not inlined into code.

Bug: v8:7549, v8:7424

R=mstarzinger@chromium.org

Change-Id: I4cec78fdd365cd0c1dab9f5f4b40ffb69f540bda
Reviewed-on: https://chromium-review.googlesource.com/962221
Commit-Queue: Ben Titzer <titzer@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51926}