immutable new folder (#5256)

That's a follow up of #5254. 

It moves to push the immutable images to a private folder
`clusterfuzz-immutable-images`

---------

Signed-off-by: Javan Lacerda <javanlacerda@google.com>

Author: javanlacerda

cli/casp/src/casp/utils/docker_utils.py

@@ -24,12 +24,15 @@
 
 # TODO: Make this configurable.
 PROJECT_TO_IMAGE = {
-    'dev': ("gcr.io/clusterfuzz-images/chromium/base/immutable/dev:"
+    'dev': ("us-central1-docker.pkg.dev/clusterfuzz-images/"
+            "clusterfuzz-immutable-images/chromium/base/immutable/dev:"
             "20251008165901-utc-893e97e-640142509185-compute-d609115-prod"),
     'internal': (
-        "gcr.io/clusterfuzz-images/chromium/base/immutable/internal:"
+        "us-central1-docker.pkg.dev/clusterfuzz-images/"
+        "clusterfuzz-immutable-images/chromium/base/immutable/internal:"
         "20251110132749-utc-363160d-640142509185-compute-c7f2f8c-prod"),
-    'external': ("gcr.io/clusterfuzz-images/base/immutable/external:"
+    'external': ("us-central1-docker.pkg.dev/clusterfuzz-images/"
+                 "clusterfuzz-immutable-images/base/immutable/external:"
                  "20251111191918-utc-b5863ff-640142509185-compute-c5c296c-prod")
 }
 _DEFAULT_WORKING_DIR = '/data/clusterfuzz'

docker/build-immutable.sh

@@ -20,12 +20,12 @@
 
 # An array of Docker image names to be built.
 IMAGES=(
-  gcr.io/clusterfuzz-images/base/immutable
-  gcr.io/clusterfuzz-images/chromium/base/immutable
-  gcr.io/clusterfuzz-images/chromium/builder/immutable
-  gcr.io/clusterfuzz-images/tworker/immutable
-  gcr.io/clusterfuzz-images/utask-main-scheduler/immutable
-  gcr.io/clusterfuzz-images/fuchsia/immutable
+  us-central1-docker.pkg.dev/clusterfuzz-images/clusterfuzz-immutable-images/base/immutable
+  us-central1-docker.pkg.dev/clusterfuzz-images/clusterfuzz-immutable-images/chromium/base/immutable
+  us-central1-docker.pkg.dev/clusterfuzz-images/clusterfuzz-immutable-images/chromium/builder/immutable
+  us-central1-docker.pkg.dev/clusterfuzz-images/clusterfuzz-immutable-images/tworker/immutable
+  us-central1-docker.pkg.dev/clusterfuzz-images/clusterfuzz-immutable-images/utask-main-scheduler/immutable
+  us-central1-docker.pkg.dev/clusterfuzz-images/clusterfuzz-immutable-images/fuchsia/immutable
 )
 
 if [ "$3" == "google.com:cluster-fuzz" ]; then
@@ -60,7 +60,7 @@ for image_name in "${IMAGES[@]}"; do
   CURRENT_CLUSTERFUZZ_REVISION="$(cat /workspace/revision.txt)"
 
   # Determine the directory containing the Dockerfile and related build context.
-  project_dir=docker/${image_name#gcr.io/clusterfuzz-images/}
+  project_dir=docker/${image_name#us-central1-docker.pkg.dev/clusterfuzz-images/clusterfuzz-immutable-images/}
   if [ "$3" == "google.com:cluster-fuzz" ]; then
     project_dir=docker/google/${image_name#gcr.io/google.com/cluster-fuzz/}
   fi