update GH builds for newly created e4.31 and removed e4.28 build targets

.github/workflows/snapshot-e431-eclipse-distro-build.yml

@@ -0,0 +1,23 @@
+name: Snapshot - 4.31 Eclipse STS Distribution Build
+
+concurrency:
+  group: e431-snapshot
+  cancel-in-progress: true
+
+#on:
+#  workflow_dispatch:
+on:
+  workflow_run:
+    workflows: ["Snapshot - Eclipse LS Extensions"]
+    types: [completed]
+    branches:
+      - "main"
+
+jobs:
+  e430-distro:
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    uses: ./.github/workflows/gh-hosted-eclipse-distro-build.yml
+    with:
+      eclipse_profile: 'e431'
+      build_type: 'snapshot'
+    secrets: inherit