[wasm] Stage far jump table behind --future

This will give us much more test coverage and fuzzer coverage.

R=mstarzinger@chromium.org

Bug: v8:9477
Change-Id: Iad76c2b5b8c7a29b4168bbefa38bac7d92a30599
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1807367Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63832}

src/flags/flag-definitions.h

@@ -766,6 +766,7 @@ DEFINE_BOOL(stress_wasm_code_gc, false,
 DEFINE_BOOL(wasm_far_jump_table, false,
             "use multiple separate code spaces that might require far jumps "
             "between them")
+DEFINE_IMPLICATION(future, wasm_far_jump_table)
 DEFINE_INT(wasm_max_initial_code_space_reservation, 0,
            "maximum size of the initial wasm code space reservation (in MB)")