infra: [TRTLLM-6331] Support show all stage name list when stage name check failed (NVIDIA#5946)

Signed-off-by: ZhanruiSunCh <[email protected]>
Signed-off-by: Zhanrui Sun <[email protected]>

Author: ZhanruiSunCh

jenkins/L0_Test.groovy

@@ -1642,7 +1642,8 @@ def checkStageNameSet(stageNames, jobKeys, paramName) {
     echo "Validate stage names for the passed GitLab bot params [${paramName}]."
     invalidStageName = stageNames.findAll { !(it in jobKeys) }
     if (invalidStageName) {
-        throw new Exception("Cannot find the stage names [${invalidStageName}] from the passed params [${paramName}].")
+        def sortedJobKeys = jobKeys.sort()
+        throw new Exception("Cannot find the stage names [${invalidStageName}] from the passed params [${paramName}]. Available stage names (${sortedJobKeys.size()} total):\n${sortedJobKeys.collect { "    ${it}" }.join('\n')}")
     }
 }