[iOS sim] Run modules_unittests on 12 cores.

Change-Id: If85ff709a55920cc914213edad5ed63826f6c5f3
Bug: None
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/287121
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Jeremy Leconte <jleconte@google.com>
Cr-Commit-Position: refs/heads/main@{#38849}

infra/specs/client.webrtc.json

@@ -10294,6 +10294,7 @@
           ],
           "dimension_sets": [
             {
+              "cores": "12",
               "cpu": "x86-64",
               "os": "Mac-12"
             }
@@ -11273,6 +11274,7 @@
           ],
           "dimension_sets": [
             {
+              "cores": "12",
               "cpu": "x86-64",
               "os": "Mac-12"
             }
@@ -12252,6 +12254,7 @@
           ],
           "dimension_sets": [
             {
+              "cores": "12",
               "cpu": "x86-64",
               "os": "Mac-12"
             }

infra/specs/test_suites.pyl

@@ -190,7 +190,7 @@
         'mixins': ['shards-2'],
       },
       'modules_unittests': {
-        'mixins': ['shards-6'],
+        'mixins': ['shards-6', 'cores-12'],
       },
       'rtc_media_unittests': {},
       'rtc_pc_unittests': {},

infra/specs/tryserver.webrtc.json

@@ -2770,6 +2770,7 @@
           ],
           "dimension_sets": [
             {
+              "cores": "12",
               "cpu": "x86-64",
               "os": "Mac-12"
             }
@@ -3749,6 +3750,7 @@
           ],
           "dimension_sets": [
             {
+              "cores": "12",
               "cpu": "x86-64",
               "os": "Mac-12"
             }
@@ -4728,6 +4730,7 @@
           ],
           "dimension_sets": [
             {
+              "cores": "12",
               "cpu": "x86-64",
               "os": "Mac-12"
             }