[Build] Unify I-build and Y-build into one common Jenkinsfile

Contributes to
- eclipse-platform#1950
- eclipse-platform#2625

JenkinsJobs/Builds/FOLDER.groovy

@@ -1,7 +1,48 @@
+def STREAMS = new groovy.json.JsonSlurper().parseText(readFileFromWorkspace('JenkinsJobs/JobDSL.json')).Streams
+
 folder('Builds') {
   description('Eclipse periodic build jobs.')
 }
 
+for (STREAM in STREAMS){
+
+	pipelineJob('Builds/I-build-' + STREAM){
+		description('Daily Eclipse Integration builds.')
+		properties {
+			pipelineTriggers {
+				triggers {
+					cron {
+						spec('''TZ=America/Toronto
+# format: Minute Hour Day Month Day of the week (0-7)
+
+# - - - Integration Eclipse SDK builds - - - 
+# 2025-03 Release Schedule
+# Normal : 6 PM every day (1/6 - 2/9)
+0 18 * * *
+
+
+# Milestone/RC Schedule 
+# Post M1, no nightlies, I-builds only. (Be sure to "turn off" for tests and sign off days)
+# 0 6 14-26 2 5-7,1-3
+# 0 18 14-26 2 5-7,1-3
+''')
+					}
+				}
+			}
+		}
+		definition {
+			cpsScm {
+				lightweight(true)
+				scm {
+					github('eclipse-platform/eclipse.platform.releng.aggregator', 'master')
+				}
+				scriptPath('JenkinsJobs/Builds/build.jenkinsfile')
+			}
+		}
+	}
+
+}
+
 pipelineJob('Builds/Build-Docker-images'){
 	description('Build and publish custom Docker images')
 	properties {