Stop GPU.FYI and Dawn Mac Intel and AMD experimental bots

Also restrict the stable bots to 13.5,
since all the machines are upgraded now.

Bug: 1462473, 1464635
Change-Id: Ideef6e1f9a44ff2b1cf36095a2cbcb39f2509dda
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4859424
Commit-Queue: Yuly Novikov <[email protected]>
Reviewed-by: Brian Sheedy <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1195549}
diff --git a/testing/buildbot/test_suite_exceptions.pyl b/testing/buildbot/test_suite_exceptions.pyl
index 382a20b..742f00d 100644
--- a/testing/buildbot/test_suite_exceptions.pyl
+++ b/testing/buildbot/test_suite_exceptions.pyl
@@ -4919,7 +4919,7 @@
             # which is used by Dawn Mac x64 Release (Intel).
             'cpu': 'x86-64',
             'gpu': '8086:3e9b',
-            'os': 'Mac-13.3.1|Mac-13.5',
+            'os': 'Mac-13.5',
             'display_attached': '1',
           },
         },
@@ -4989,7 +4989,7 @@
             # which is used by Dawn Mac x64 Release (Intel).
             'cpu': 'x86-64',
             'gpu': '8086:3e9b',
-            'os': 'Mac-13.3.1|Mac-13.5',
+            'os': 'Mac-13.5',
             'display_attached': '1',
           },
         },