[GHA-Build] Separate distro and ls extensions builds. Initial trial of clearing S3 caches

.github/workflows/snapshot-eclipse-ls-extensions-build.yml

@@ -4,12 +4,12 @@ concurrency:
   group: eclipse-ls-extension-snapshot
   cancel-in-progress: true
 
-#on:
-#  workflow_dispatch:
 on:
-  push:
-    branches:
-      - 'main'
+  workflow_dispatch:
+#on:
+#  push:
+#    branches:
+#      - 'main'
 
 jobs:
   eclipse-ls-extensions: