add a Mac Builder using Python2 less bot

This builder uses
https://chromium-swarm.appspot.com/bot?id=mac-1064-g580

Bug: 1324494
Change-Id: Iaac6ead91cf080f42dc0fee0fbf9d695c33ec93f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3670677
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1007870}
NOKEYCHECK=True
GitOrigin-RevId: be40ebb0df52d17b30f878ca0898318cea301b39
diff --git a/mb_config.pyl b/mb_config.pyl
index a4e2228..e69156c 100644
--- a/mb_config.pyl
+++ b/mb_config.pyl
@@ -344,6 +344,7 @@
       'Linux ChromiumOS MSan Focal': 'chromeos_msan_release_bot',
       'Linux MSan Focal': 'msan_release_bot_reclient',
       'Linux Viz': 'release_trybot_minimal_symbols_reclient',
+      'Mac Builder (py2 less)': 'gpu_tests_release_bot_minimal_symbols_no_nacl',
       # TODO(crbug.com/1260232): remove this after the migration.
       'Mac Builder (reclient compare)': 'gpu_tests_release_bot_minimal_symbols_reclient',
       # TODO(crbug.com/1244441): remove this after the migration.
diff --git a/mb_config_expectations/chromium.fyi.json b/mb_config_expectations/chromium.fyi.json
index 595ef63..b136204 100644
--- a/mb_config_expectations/chromium.fyi.json
+++ b/mb_config_expectations/chromium.fyi.json
@@ -342,6 +342,18 @@
       "use_remoteexec": true
     }
   },
+  "Mac Builder (py2 less)": {
+    "gn_args": {
+      "dcheck_always_on": false,
+      "enable_nacl": false,
+      "ffmpeg_branding": "Chrome",
+      "is_component_build": false,
+      "is_debug": false,
+      "proprietary_codecs": true,
+      "symbol_level": 1,
+      "use_goma": true
+    }
+  },
   "Mac Builder (reclient compare)": {
     "gn_args": {
       "dcheck_always_on": false,