[Core CI] Add per-commit BM jobs for third-party projects

PRODX-39662

Change-Id: I27d230e29acfe3473befbdf3899a758882adf0ee
diff --git a/src/com/mirantis/mk/KaasUtils.groovy b/src/com/mirantis/mk/KaasUtils.groovy
index 20cb306..6e68c3f 100644
--- a/src/com/mirantis/mk/KaasUtils.groovy
+++ b/src/com/mirantis/mk/KaasUtils.groovy
@@ -977,6 +977,9 @@
         if (triggers.vsphereDemoEnabled) {
             platforms.add('vsphere')
         }
+        if (triggers.bmCoreDemoEnabled) {
+            platforms.add('bm')
+        }
     }
 
     def jobs = [:]