Remove unecessary null check, add for *message

Author: jH-

packages/azure/data_stream/application_gateway/elasticsearch/ingest_pipeline/default.yml

@@ -227,7 +227,7 @@ processors:
       field: json.properties.details.data
       target_field: event.reason
       ignore_missing: true
-      if: 'ctx.json?.properties?.details?.data != null && !(ctx.json?.properties?.details?.message.contains("Equal 0")) && !(ctx.json?.properties?.details?.message.contains("EQ matched 0"))'
+      if: ctx.json?.properties?.details?.message != null && !ctx.json.properties.details.message.contains("Equal 0") && !ctx.json.properties.details.message.contains("EQ matched 0")
   - rename:
       field: json.properties.ruleSetType
       target_field: rule.category