[jenkins] disable CI metrics for temporary feature branches (#81938)

Co-authored-by: spalger <spalger@users.noreply.github.com>

vars/getCheckoutInfo.groovy

@@ -2,6 +2,7 @@ def call(branchOverride) {
   def repoInfo = [
     branch: branchOverride ?: env.ghprbSourceBranch,
     targetBranch: env.ghprbTargetBranch,
+    targetsTrackedBranch: true
   ]
 
   if (repoInfo.branch == null) {
@@ -35,6 +36,10 @@ def call(branchOverride) {
       label: "determining merge point with '${repoInfo.targetBranch}' at origin",
       returnStdout: true
     ).trim()
+
+    def pkgJson = readFile("package.json")
+    def releaseBranch = toJSON(pkgJson).branch
+    repoInfo.targetsTrackedBranch = releaseBranch == repoInfo.targetBranch
   }
 
   print "repoInfo: ${repoInfo}"

vars/githubPr.groovy

@@ -149,7 +149,7 @@ def getTestFailuresMessage() {
 def getBuildStatusIncludingMetrics() {
   def status = buildUtils.getBuildStatus()
 
-  if (status == 'SUCCESS' && !ciStats.getMetricsSuccess()) {
+  if (status == 'SUCCESS' && shouldCheckCiMetricSuccess() && !ciStats.getMetricsSuccess()) {
     return 'FAILURE'
   }
 
@@ -297,3 +297,12 @@ def getFailedSteps() {
     step.displayName != 'Check out from version control'
   }
 }
+
+def shouldCheckCiMetricSuccess() {
+  // disable ciMetrics success check when a PR is targetting a non-tracked branch
+  if (buildState.has('checkoutInfo') && !buildState.get('checkoutInfo').targetsTrackedBranch) {
+    return false
+  }
+
+  return true
+}