Migrate Windows AOT Engine to Engine V2. (flutter/engine#41515)

Both builds are generating artifacts in the same way. This is moving the legacy builder to staging and updating Windows windows_aot_engine build to upload artifacts to prod.

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

engine/src/flutter/.ci.yaml

@@ -456,6 +456,7 @@ targets:
       config_name: mac_impeller_cmake_example
 
   - name: Windows Android AOT Engine
+    bringup: true
     recipe: engine/engine
     properties:
       build_android_aot: "true"

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

@@ -8,7 +8,8 @@
                     "include_paths": [
                         "out/android_profile/zip_archives/android-arm-profile/windows-x64.zip"
                     ],
-                    "name": "android_profile"
+                    "name": "android_profile",
+                    "realm": "production"
                 }
             ],
             "drone_dimensions": [
@@ -36,7 +37,8 @@
                     "include_paths": [
                         "out/android_profile_arm64/zip_archives/android-arm64-profile/windows-x64.zip"
                     ],
-                    "name": "android_profile_arm64"
+                    "name": "android_profile_arm64",
+                    "realm": "production"
                 }
             ],
             "drone_dimensions": [
@@ -65,7 +67,8 @@
                     "include_paths": [
                         "out/android_profile_x64/zip_archives/android-x64-profile/windows-x64.zip"
                     ],
-                    "name": "android_profile_x64"
+                    "name": "android_profile_x64",
+                    "realm": "production"
                 }
             ],
             "drone_dimensions": [
@@ -94,7 +97,8 @@
                     "include_paths": [
                         "out/android_release/zip_archives/android-arm-release/windows-x64.zip"
                     ],
-                    "name": "android_release"
+                    "name": "android_release",
+                    "realm": "production"
                 }
             ],
             "drone_dimensions": [
@@ -122,7 +126,8 @@
                     "include_paths": [
                         "out/android_release_arm64/zip_archives/android-arm64-release/windows-x64.zip"
                     ],
-                    "name": "android_release_arm64"
+                    "name": "android_release_arm64",
+                    "realm": "production"
                 }
             ],
             "drone_dimensions": [
@@ -151,7 +156,8 @@
                     "include_paths": [
                         "out/android_release_x64/zip_archives/android-x64-release/windows-x64.zip"
                     ],
-                    "name": "android_release_x64"
+                    "name": "android_release_x64",
+                    "realm": "production"
                 }
             ],
             "drone_dimensions": [