chore: split snapshot tests from main API tests (#4929)

The failures of the snapshot tests being lumped in with the other API
tests lead to error fatigue. I'm splitting these up, and having separate
Cloud Build jobs for everything.

Author: michaelkedar

cloudbuild.yaml

@@ -34,8 +34,7 @@ steps:
 
 - name: 'gcr.io/google.com/cloudsdktool/cloud-sdk:slim'
   id: 'api-tests'
-  # Need custom service account for api tests access to oss-vdb-test datastore
-  args: ['gcloud', 'builds', 'submit', '--region=${LOCATION}', '--config=gcp/api/cloudbuild.yaml', '--service-account=projects/oss-vdb/serviceAccounts/api-e2e-tester@oss-vdb.iam.gserviceaccount.com', '.']
+  args: ['gcloud', 'builds', 'submit', '--region=${LOCATION}', '--config=gcp/api/cloudbuild.yaml', '.']
   waitFor: ['init']
 
 - name: 'gcr.io/google.com/cloudsdktool/cloud-sdk:slim'

gcp/api/cloudbuild.yaml

@@ -41,13 +41,6 @@ steps:
   args: ['bash', '-ex', 'run_tests.sh', '/workspace/dummy.json']
   waitFor: ['init', 'sync']
 
-- name: 'gcr.io/oss-vdb/ci'
-  id: 'api-snapshot-tests'
-  dir: gcp/api
-  args: ['bash', '-ex', 'run_tests_e2e.sh', '/workspace/dummy.json']
-  # Don't run at the same time as api-tests
-  waitFor: ['init', 'sync', 'api-tests']
-
 timeout: 7200s
 serviceAccount: 'projects/oss-vdb/serviceAccounts/api-e2e-tester@oss-vdb.iam.gserviceaccount.com'
 options:

gcp/api/snapshot_tests.yaml

@@ -0,0 +1,40 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# api e2e test runner
+# This should be triggered on changes to the following:
+# gcp/api/poetry.lock
+# gcp/api/run_tests_e2e.sh
+# gcp/api/*.py
+# gcp/api/**/*.py
+# osv/*.py
+# osv/**/*.py
+# tools/apitester/**
+steps:
+- name: 'gcr.io/oss-vdb/ci'
+  id: 'sync'
+  dir: gcp/api
+  args: ['poetry', 'sync']
+
+- name: 'gcr.io/oss-vdb/ci'
+  id: 'api-snapshot-tests'
+  dir: gcp/api
+  args: ['bash', '-ex', 'run_tests_e2e.sh', '/workspace/dummy.json']
+
+timeout: 7200s
+serviceAccount: 'projects/oss-vdb/serviceAccounts/api-e2e-tester@oss-vdb.iam.gserviceaccount.com'
+options:
+  logging: CLOUD_LOGGING_ONLY
+  env:
+    - CLOUDBUILD=1