[iOS][infra] Add iPhone 6s 12.4 & 13.3 simulator to noncq builder.

This is in preparation for moving EG2 to CQ. These two form factors run
in ios-simulator but not on any builder running EG2 tests. Adding these
to catch any issue before moving EG2 to CQ.

Bug: 1079456
Change-Id: I7a59250c87f9da7a76c74886fc39d3e6b15acc3c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2186999
Commit-Queue: Zhaoyang Li <zhaoyangli@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#768940}

ios/build/bots/chromium.mac/ios-simulator-noncq.json

@@ -19,6 +19,22 @@
   ],
   "configuration": "Debug",
   "tests": [
+    {
+      "xcode parallelization": true,
+      "include": "eg2_tests.json",
+      "device type": "iPhone 6s",
+      "os": "13.4",
+      "pool":"chromium.tests.template",
+      "host os": "Mac-10.15"
+    },
+    {
+      "xcode parallelization": true,
+      "include": "eg2_tests.json",
+      "device type": "iPhone 6s",
+      "os": "12.4",
+      "pool":"chromium.tests.template",
+      "host os": "Mac-10.15"
+    },
     {
       "xcode parallelization": true,
       "include": "eg2_tests.json",