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

This reverts commit f187d0a1.

Reason for revert: https://crbug.com/v8/11587

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}

Bug: v8:11527, v8:11587
Change-Id: I76a1baccdf20ed32b02fe8509ae13f7b62651592
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2773051
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#73518}

infra/testing/builders.pyl

@@ -758,7 +758,6 @@
     },
     'tests': [
       {'name': 'v8testing', 'shards': 8},
-      {'name': 'v8testing', 'variant': 'future', 'shards': 2},
     ],
   },
   'v8_mac_arm64_sim_dbg_ng_triggered': {
@@ -769,7 +768,6 @@
     },
     'tests': [
       {'name': 'v8testing', 'shards': 8},
-      {'name': 'v8testing', 'variant': 'future', 'shards': 2},
     ],
   },
   'v8_mac_arm64_sim_nodcheck_rel_ng_triggered': {
@@ -780,7 +778,6 @@
     },
     'tests': [
       {'name': 'v8testing', 'shards': 8},
-      {'name': 'v8testing', 'variant': 'future', 'shards': 2},
     ],
   },
   ##############################################################################
@@ -1424,8 +1421,8 @@
       'priority': 35,
     },
     'tests': [
-      {'name': 'v8testing'},
-      {'name': 'v8testing', 'variant': 'extra'},
+      {'name': 'd8testing'},
+      {'name': 'd8testing', 'variant': 'extra'},
     ],
   },
   'V8 Mac - arm64 - sim - debug': {
@@ -1441,7 +1438,6 @@
     },
     'tests': [
       {'name': 'v8testing', 'shards': 8},
-      {'name': 'v8testing', 'variant': 'future', 'shards': 2},
     ],
   },
   'V8 Mac - arm64 - sim - release': {
@@ -1457,7 +1453,6 @@
     },
     'tests': [
       {'name': 'v8testing', 'shards': 8},
-      {'name': 'v8testing', 'variant': 'future', 'shards': 2},
     ],
   },
   'V8 Win32': {