Shift mac_clang_tidy to a Linux orchestrator. (#162042)

Towards https://github.com/flutter/flutter/issues/160701.

This adds a `bringup: true` node that duplicates what `Mac
mac_clang_tidy` is doing, to be turned down/up in a follow-up.

engine/src/flutter/.ci.yaml

@@ -457,6 +457,26 @@ targets:
       # at https://github.com/flutter/flutter/issues/152186.
       cores: "8"
 
+  - name: Linux mac_clang_tidy
+    recipe: engine_v2/engine_v2
+    bringup: true
+    properties:
+      config_name: mac_clang_tidy
+    runIf:
+      - DEPS
+      - engine/src/flutter/.ci.yaml
+      - "engine/src/flutter/**.(h|c|cc|fbs|frag|vert|m|mm)"
+    # Do not remove(https://github.com/flutter/flutter/issues/144644)
+    # Scheduler will fail to get the platform
+    drone_dimensions:
+      - os=Linux
+    dimensions:
+      # This is needed so that orchestrators that only spawn subbuilds are not
+      # assigned to the large 32 core workers when doing release builds.
+      # For more details see the issue
+      # at https://github.com/flutter/flutter/issues/152186.
+      cores: "8"
+
   - name: Mac mac_clang_tidy
     recipe: engine_v2/engine_v2
     timeout: 120

engine/src/flutter/ci/builders/mac_clang_tidy.json

@@ -26,6 +26,11 @@
             "description": "A debug mode macOS host build used only as the basis for a clang-tidy run.",
             "ninja": {
                 "config": "ci/host_debug_clang_tidy"
+            },
+            "properties": {
+                "$flutter/osx_sdk": {
+                    "sdk_version": "15a240d"
+                }
             }
         },
         {
@@ -55,6 +60,11 @@
             "description": "A debug mode iOS simulator build used only as the basis for a clang-tidy run.",
             "ninja": {
                 "config": "ci/ios_debug_sim_clang_tidy"
+            },
+            "properties": {
+                "$flutter/osx_sdk": {
+                    "sdk_version": "15a240d"
+                }
             }
         }
     ],