Add the eclipse task to our CI builds

Author: marcphilipp

.github/actions/main-build/action.yml

@@ -4,7 +4,7 @@ inputs:
   arguments:
     required: true
     description: Gradle arguments
-    default: :platform-tooling-support-tests:test build --no-configuration-cache # Disable configuration cache due to https://github.com/diffplug/spotless/issues/2318
+    default: :platform-tooling-support-tests:test build eclipse --no-configuration-cache # Disable configuration cache due to https://github.com/diffplug/spotless/issues/2318
   encryptionKey:
     required: true
     description: Gradle cache encryption key