Temporarily run Mac mac_host_engine on only Mac-13 (#53313)

Temporary solution for flutter/flutter#150011.

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style

Author: vashworth

.ci.yaml

@@ -363,7 +363,7 @@ targets:
           "sdk_version": "15a240d"
         }
     drone_dimensions:
-      - os=Mac-13|Mac-14
+      - os=Mac-13
 
   - name: Linux mac_clangd
     recipe: engine_v2/engine_v2

ci/builders/mac_host_engine.json

@@ -15,7 +15,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-13|Mac-14",
+                "os=Mac-13",
                 "cpu=x86",
                 "mac_model=Macmini8,1"
             ],
@@ -100,7 +100,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-13|Mac-14",
+                "os=Mac-13",
                 "cpu=x86",
                 "mac_model=Macmini8,1"
             ],
@@ -180,7 +180,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-13|Mac-14",
+                "os=Mac-13",
                 "cpu=x86",
                 "mac_model=Macmini8,1"
             ],
@@ -268,7 +268,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-13|Mac-14",
+                "os=Mac-13",
                 "cpu=x86"
             ],
             "gclient_variables": {
@@ -337,7 +337,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-13|Mac-14",
+                "os=Mac-13",
                 "cpu=x86"
             ],
             "gclient_variables": {
@@ -409,7 +409,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-13|Mac-14",
+                "os=Mac-13",
                 "cpu=arm64"
             ],
             "gclient_variables": {