Upload windows arm artifacts to production bucket. (#41324)

This will start uploading the arm artifacts to the production bucket without the experimental namespace.

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

Author: godofredoc

ci/builders/windows_arm_host_engine.json

@@ -13,7 +13,8 @@
                         "out/host_debug_arm64/zip_archives/windows-arm64-debug/windows-arm64-flutter.zip",
                         "out/host_debug_arm64/zip_archives/windows-arm64/flutter-cpp-client-wrapper.zip"
                     ],
-                    "name": "host_debug_arm64"
+                    "name": "host_debug_arm64",
+                    "realm": "production"
                 }
             ],
             "drone_dimensions": [
@@ -52,7 +53,8 @@
                     "include_paths": [
                         "out/host_profile_arm64/zip_archives/windows-arm64-profile/windows-arm64-flutter.zip"
                     ],
-                    "name": "host_profile_arm64"
+                    "name": "host_profile_arm64",
+                    "realm": "production"
                 }
             ],
             "drone_dimensions": [
@@ -88,7 +90,8 @@
                     "include_paths": [
                         "out/host_release_arm64/zip_archives/windows-arm64-release/windows-arm64-flutter.zip"
                     ],
-                    "name": "host_profile_arm64"
+                    "name": "host_profile_arm64",
+                    "realm": "production"
                 }
             ],
             "drone_dimensions": [