chronos cloudbuild: Build msan and make pushing images error resilient. (#13432)

Sometimes we may not build all images, so just push what we have
available instead of requiring they all exist.

Author: oliverchang

infra/experimental/chronos/cloudbuild.yaml

@@ -34,6 +34,38 @@ steps:
   - address
   env:
   - RUN_ALL=1
+- name: 'gcr.io/cloud-builders/docker'
+  args:
+  - push
+  - us-central1-docker.pkg.dev/oss-fuzz/oss-fuzz-gen/${_PROJECT}-ofg-ccache-address
+  allowFailure: true
+- name: 'gcr.io/cloud-builders/docker'
+  args:
+  - push
+  - us-central1-docker.pkg.dev/oss-fuzz/oss-fuzz-gen/${_PROJECT}-ofg-cached-address
+  allowFailure: true
+
+- name: 'gcr.io/cloud-builders/docker'
+  entrypoint: /bin/bash
+  args:
+  - /workspace/infra/experimental/chronos/build_cache_local.sh
+  - ${_PROJECT}
+  - ${_FUZZING_LANGUAGE}
+  - memory
+  env:
+  - RUN_ALL=1
+  allowFailure: true  # MSan is finicky, so let this fail.
+- name: 'gcr.io/cloud-builders/docker'
+  args:
+  - push
+  - us-central1-docker.pkg.dev/oss-fuzz/oss-fuzz-gen/${_PROJECT}-ofg-ccache-memory
+  allowFailure: true
+- name: 'gcr.io/cloud-builders/docker'
+  args:
+  - push
+  - us-central1-docker.pkg.dev/oss-fuzz/oss-fuzz-gen/${_PROJECT}-ofg-cached-memory
+  allowFailure: true
+
 - name: 'gcr.io/cloud-builders/docker'
   entrypoint: /bin/bash
   args:
@@ -43,11 +75,16 @@ steps:
   - coverage
   env:
   - RUN_ALL=1
-images:
-- us-central1-docker.pkg.dev/oss-fuzz/oss-fuzz-gen/${_PROJECT}-ofg-cached-address
-- us-central1-docker.pkg.dev/oss-fuzz/oss-fuzz-gen/${_PROJECT}-ofg-cached-coverage
-- us-central1-docker.pkg.dev/oss-fuzz/oss-fuzz-gen/${_PROJECT}-ofg-ccache-address
-- us-central1-docker.pkg.dev/oss-fuzz/oss-fuzz-gen/${_PROJECT}-ofg-ccache-coverage
+- name: 'gcr.io/cloud-builders/docker'
+  args:
+  - push
+  - us-central1-docker.pkg.dev/oss-fuzz/oss-fuzz-gen/${_PROJECT}-ofg-cached-coverage
+  allowFailure: true
+- name: 'gcr.io/cloud-builders/docker'
+  args:
+  - push
+  - us-central1-docker.pkg.dev/oss-fuzz/oss-fuzz-gen/${_PROJECT}-ofg-ccache-coverage
+  allowFailure: true
 timeout: 72000s  # 20 hours, same as build_lib.py
 logsBucket: oss-fuzz-gcb-logs
 tags: