[infra] Route fuchsia builder to the c4 instance.

Change-Id: Iac871313fabd20d0e36fab6b933aa801cd24a8fb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/461580
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
diff --git a/generated/cr-buildbucket.cfg b/generated/cr-buildbucket.cfg
index 2ae4169..6171ae3 100644
--- a/generated/cr-buildbucket.cfg
+++ b/generated/cr-buildbucket.cfg
@@ -8060,8 +8060,9 @@
       name: "vm-fuchsia-release-x64"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cpu:x86-64"
-      dimensions: "host_class:virtualization"
-      dimensions: "os:Ubuntu-22"
+      dimensions: "host_class:default"
+      dimensions: "kvm:1"
+      dimensions: "os:Ubuntu-24"
       dimensions: "pool:luci.dart.try"
       exe {
         cipd_package: "dart/recipe_bundles/dart.googlesource.com/recipes"
@@ -14015,8 +14016,9 @@
       name: "vm-fuchsia-release-x64-try"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cpu:x86-64"
-      dimensions: "host_class:virtualization"
-      dimensions: "os:Ubuntu-22"
+      dimensions: "host_class:default"
+      dimensions: "kvm:1"
+      dimensions: "os:Ubuntu-24"
       dimensions: "pool:luci.dart.try"
       exe {
         cipd_package: "dart/recipe_bundles/dart.googlesource.com/recipes"
diff --git a/generated/project.cfg b/generated/project.cfg
index d05e60c3..4f7d523 100644
--- a/generated/project.cfg
+++ b/generated/project.cfg
@@ -7,7 +7,7 @@
 name: "dart"
 access: "group:all"
 lucicfg {
-  version: "1.45.8"
+  version: "1.46.1"
   package_dir: ".."
   config_dir: "generated"
   entry_point: "main.star"
diff --git a/vm.star b/vm.star
index 1affee8a..a066920 100644
--- a/vm.star
+++ b/vm.star
@@ -420,7 +420,7 @@
     "vm-fuchsia-release-x64",
     category = "vm|misc|f",
     channels = ["try"],
-    dimensions = [jammy, {"host_class": "virtualization"}],
+    dimensions = [noble, {"kvm": "1"}],
     properties = [fuchsia_deps],
 )