Reland "[maglev] Enable --maglev with --future"

Bug: v8:7700
Change-Id: Ic14006b4f3bed1f48cb910b1d1eb2d45fc207d8d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4118771
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Auto-Submit: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#84968}

src/flags/flag-definitions.h

@@ -455,6 +455,7 @@ DEFINE_BOOL(lower_tier_as_toptier, false,
 #ifdef V8_ENABLE_MAGLEV
 #define V8_ENABLE_MAGLEV_BOOL true
 DEFINE_BOOL(maglev, false, "enable the maglev optimizing compiler")
+DEFINE_WEAK_IMPLICATION(future, maglev)
 DEFINE_BOOL(maglev_inlining, false,
             "enable inlining in the maglev optimizing compiler")
 DEFINE_BOOL(maglev_reuse_stack_slots, true,

test/mjsunit/interrupt-budget-override.js

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --turbofan --interrupt-budget=100 --interrupt-budget-for-feedback-allocation=10 --allow-natives-syntax
+// Flags: --turbofan --interrupt-budget=100 --interrupt-budget-for-feedback-allocation=10 --allow-natives-syntax --nomaglev
 
 function f() {
   let s = 0;

test/mjsunit/never-optimize.js

@@ -26,7 +26,7 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --allow-natives-syntax --turbofan --no-always-turbofan --no-use-osr
-// Flags: --interrupt-budget=1024
+// Flags: --interrupt-budget=1024 --nomaglev
 
 function o1() { }
 %PrepareFunctionForOptimization(o1);