Remove logic for pushing major-versioned whereami Helm chart (#1550)

* Update cloudbuild.yaml

* Fix "helm push" of whereami Helm major version

* Use us-docker.pkg.dev/google-samples/charts/whereami:1.2.23

* Bring back oci://

* Repackage for major tag chart

* Update cloudbuild.yaml

* Remove major-tag-only whereami Helm logic

quickstarts/whereami/cloudbuild.yaml

@@ -48,8 +48,6 @@ steps:
     cd quickstarts/whereami/helm-chart
     helm package . # This creates a file similar to whereami-X.Y.Z.tgz
     helm push whereami-1.2.23.tgz oci://us-docker.pkg.dev/google-samples/charts
-    cp whereami-1.2.23.tgz whereami-1.tgz
-    helm push whereami-1.tgz oci://us-docker.pkg.dev/google-samples/charts
 
 images:
   - 'gcr.io/google-samples/whereami:v1'