Reland "[test] Extend testing on Mac on arm64"

This is a reland of f187d0a1

The cctest breakage got fixed in the meantime.

Original change's description:
> [test] Extend testing on Mac on arm64
>
> Ensure more testing of --future for different test types on Mac.
>
> No-Try: true
> Bug: v8:11527
> Change-Id: Iac499dc48dde3342ad2057f86ef1ad5fa43b4eac
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2772981
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73514}

No-Try: true
Bug: v8:11527
Change-Id: Ie82c69e652f84a7ac43436d28806e70f27aa3e72
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2807601
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73806}

infra/testing/builders.pyl

@@ -760,6 +760,7 @@
     },
     'tests': [
       {'name': 'v8testing', 'shards': 8},
+      {'name': 'v8testing', 'variant': 'future', 'shards': 2},
     ],
   },
   'v8_mac_arm64_sim_dbg_ng_triggered': {
@@ -770,6 +771,7 @@
     },
     'tests': [
       {'name': 'v8testing', 'shards': 8},
+      {'name': 'v8testing', 'variant': 'future', 'shards': 2},
     ],
   },
   'v8_mac_arm64_sim_nodcheck_rel_ng_triggered': {
@@ -780,6 +782,7 @@
     },
     'tests': [
       {'name': 'v8testing', 'shards': 8},
+      {'name': 'v8testing', 'variant': 'future', 'shards': 2},
     ],
   },
   ##############################################################################
@@ -1427,8 +1430,8 @@
       'priority': 35,
     },
     'tests': [
-      {'name': 'd8testing'},
-      {'name': 'd8testing', 'variant': 'extra'},
+      {'name': 'v8testing'},
+      {'name': 'v8testing', 'variant': 'extra'},
     ],
   },
   'V8 Mac - arm64 - debug': {
@@ -1460,6 +1463,7 @@
     },
     'tests': [
       {'name': 'v8testing', 'shards': 8},
+      {'name': 'v8testing', 'variant': 'future', 'shards': 2},
     ],
   },
   'V8 Mac - arm64 - sim - release': {
@@ -1475,6 +1479,7 @@
     },
     'tests': [
       {'name': 'v8testing', 'shards': 8},
+      {'name': 'v8testing', 'variant': 'future', 'shards': 2},
     ],
   },
   'V8 Win32': {