[wasm][gc] Enable wasm code gc by default

This flips the flag to enable wasm code gc by default. Note that
chromium override this default, so it will need a separate CL.

R=mstarzinger@chromium.org
CC=hablich@chromium.org

Bug: v8:8217
Change-Id: If638fbda423449ed576237745db284dc449fb467
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1687674Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62510}

src/flags/flag-definitions.h

@@ -718,8 +718,7 @@ DEFINE_BOOL(wasm_lazy_validation, false,
 DEFINE_NEG_IMPLICATION(wasm_interpret_all, asm_wasm_lazy_compilation)
 DEFINE_NEG_IMPLICATION(wasm_interpret_all, wasm_lazy_compilation)
 DEFINE_NEG_IMPLICATION(wasm_interpret_all, wasm_tier_up)
-DEFINE_BOOL(wasm_code_gc, false, "enable garbage collection of wasm code")
-DEFINE_IMPLICATION(future, wasm_code_gc)
+DEFINE_BOOL(wasm_code_gc, true, "enable garbage collection of wasm code")
 DEFINE_BOOL(trace_wasm_code_gc, false, "trace garbage collection of wasm code")
 DEFINE_BOOL(stress_wasm_code_gc, false,
             "stress test garbage collection of wasm code")