fix: need to update to use new trampoline_release.py script as well a…

…s update to configure docker auth with new image (#3356)

* fix: need to update to use new trampoline_release script

* temp d not do any of the actual values, just testing

* revert testing release

* add better comment for docker auth logic

* add better comment for docker auth logic

* add back trampoline image for publish_javadoc.cfg, it isn't reading the common.cfg value

.kokoro/publish_javadoc.cfg

@@ -5,6 +5,11 @@ env_vars: {
   value: "github/spring-cloud-gcp/.kokoro/publish_javadoc.sh"
 }
 
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "us-central1-docker.pkg.dev/cloud-sdk-release-custom-pool/release-images/java17"
+}
+
 before_action {
   fetch_keystore {
     keystore_resource {

.kokoro/trampoline.sh

@@ -23,4 +23,13 @@ function cleanup() {
 trap cleanup EXIT
 
 $(dirname $0)/populate-secrets.sh # Secret Manager secrets.
-python3 "${KOKORO_GFILE_DIR}/trampoline_v1.py"
+TRAMPOLINE_HOST=$(echo "${TRAMPOLINE_IMAGE}" | cut -d/ -f1)
+if [[ ! "${TRAMPOLINE_HOST}" =~ "gcr.io" ]]; then
+  # You have to run on an update version of gcloud, in order to pass in the host name in
+  # configure-docker command. This is not necessary for gcr.io because that is a default
+  # repository name and is not required to specify the repo when running configure-docker.
+  echo "TRAMPOLINE_HOST: ${TRAMPOLINE_HOST}"
+  gcloud components update
+  gcloud auth configure-docker "${TRAMPOLINE_HOST}"
+fi
+python3 "${KOKORO_GFILE_DIR}/trampoline_release.py"