feat(cloudconfig): support multi container configuration

Cloud Run now supports multi container deployments (up to 10 per instance).

With this change, sidecar container defined environment variables are not set for the ingress container.

Official docs: https://cloud.google.com/run/docs/deploying\#multicontainer-yaml

cloudconfig/yaml.go

@@ -49,7 +49,7 @@ func setEnvFromYAMLServiceSpecificationFile(name string) (err error) {
 			return err
 		}
 		containers := config.Spec.Template.Spec.Containers
-		if len(containers) != 1 {
+		if len(containers) == 0 || len(containers) > 10 {
 			return fmt.Errorf("unexpected number of containers: %d", len(containers))
 		}
 		if config.Metadata.Name != "" {
@@ -81,7 +81,7 @@ func setEnvFromYAMLServiceSpecificationFile(name string) (err error) {
 			return err
 		}
 		containers := config.Spec.Template.Spec.Template.Spec.Containers
-		if len(containers) != 1 {
+		if len(containers) == 0 || len(containers) > 10 {
 			return fmt.Errorf("unexpected number of containers: %d", len(containers))
 		}
 		if config.Metadata.Name != "" {