chore(nodejs): use cloud-rad publication process (#1112)

VERSION is used in @google-cloud/cloud-rad to publish ref docs for
a particular version. Pass VERSION in via Stubby or Fusion.
Source-Link: googleapis/synthtool@740366b
Post-Processor: gcr.io/repo-automation-bots/owlbot-nodejs:latest@sha256:bbdd52de226c00df3356cdf25460397b429ab49552becca645adbc412f6a4ed5

.github/.OwlBot.lock.yaml

@@ -1,4 +1,3 @@
 docker:
-  digest: sha256:f556e6e7be625deb1b2429fe608df27be57185c3e6b7d39ee0059f1609f17530
-  image: gcr.io/repo-automation-bots/owlbot-nodejs:latest  
-
+  image: gcr.io/repo-automation-bots/owlbot-nodejs:latest
+  digest: sha256:bbdd52de226c00df3356cdf25460397b429ab49552becca645adbc412f6a4ed5

.github/generated-files-bot.yml

@@ -3,8 +3,8 @@ generatedFiles:
   message: '`.kokoro` files are templated and should be updated in [`synthtool`](https://github.com/googleapis/synthtool)'
 - path: '.github/CODEOWNERS'
   message: 'CODEOWNERS should instead be modified via the `codeowner_team` property in .repo-metadata.json'
-- path: '.github/workflows/**'
-  message: '`.github/workflows` (GitHub Actions) should be updated in [`synthtool`](https://github.com/googleapis/synthtool)'
+- path: '.github/workflows/ci.yaml'
+  message: '`.github/workflows/ci.yaml` (GitHub Actions) should be updated in [`synthtool`](https://github.com/googleapis/synthtool)'
 - path: '.github/generated-files-bot.+(yml|yaml)'
   message: '`.github/generated-files-bot.(yml|yaml)` should be updated in [`synthtool`](https://github.com/googleapis/synthtool)'
 - path: 'README.md'

.trampolinerc

@@ -20,7 +20,8 @@ required_envvars+=(
 
 # Add env vars which are passed down into the container here.
 pass_down_envvars+=(
-    "AUTORELEASE_PR"
+    "AUTORELEASE_PR",
+    "VERSION"
 )
 
 # Prevent unintentional override on the default image.