refactor out CRD diff test optimazation

Author: jiangzho

spark-operator-api/build.gradle

@@ -89,31 +89,8 @@ tasks.register("assertGeneratedCRDMatchesHelmChart") {
         "${stagedCRDFileBase}sparkclusters.spark.apache.org-v1.yaml"
     ].execute().text.trim()
     if (generatedAppCRD != stagedAppCRD || generatedClusterCRD != stagedClusterCRD) {
-      def errorMessage = new StringBuilder("Generated CRD yaml does not match the staged " +
-          "version in Helm Chart, please keep the chart updated.\n\n")
-
-      if (generatedAppCRD != stagedAppCRD) {
-        errorMessage.append("=== SparkApplication CRD Differences ===\n")
-        def appDiff = ["bash", "-c",
-          "diff -u <(echo '${generatedAppCRD.replace("'", "'\\''")}' " +
-              "| yq -P 'sort_keys(..)') <(echo '${stagedAppCRD.replace("'", "'\\''")}' " +
-              "| yq -P 'sort_keys(..)')"]
-          .execute().text
-        errorMessage.append(appDiff ?: "Unable to generate diff\n")
-        errorMessage.append("\n")
-      }
-
-      if (generatedClusterCRD != stagedClusterCRD) {
-        errorMessage.append("=== SparkCluster CRD Differences ===\n")
-        def clusterDiff = ["bash", "-c",
-          "diff -u <(echo '${generatedClusterCRD.replace("'", "'\\''")}' " +
-              "| yq -P 'sort_keys(..)') <(echo '${stagedClusterCRD.replace("'", "'\\''")}' " +
-              "| yq -P 'sort_keys(..)')"]
-          .execute().text
-        errorMessage.append(clusterDiff ?: "Unable to generate diff\n")
-      }
-
-      throw new GradleException(errorMessage.toString())
+      throw new GradleException("Generated CRD yaml does not match the staged version in " +
+          "Helm Chart, please keep the chart updated.")
     }
   }
 }