Enabled Wasm interpreter as first-class tier. Depending on the flag
{--wasm-interpret-all} the interpreter is the default and only tier
used to run Wasm modules.

Change-Id: I9ffa333f7138437e646dee2113f06c1676bac331
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1516292
Commit-Queue: Frederik Gossen <frgossen@google.com>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60190}