Revert "remove not used code"

This reverts commit 84eec7b.

Author: csviri

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/api/reconciler/PrimaryUpdateAndCacheUtils.java

@@ -117,6 +117,14 @@ public static <P extends HasMetadata> P patchAndCacheStatus(
     return updatedResource;
   }
 
+  private static <P extends HasMetadata> void checkResourceVersionPresent(P primary) {
+    if (primary.getMetadata().getResourceVersion() == null) {
+      throw new IllegalStateException(
+          "Primary resource version is null, it is expected to set resource version for updates for caching. Name: %s namespace: %s"
+              .formatted(primary.getMetadata().getName(), primary.getMetadata().getNamespace()));
+    }
+  }
+
   private static <P extends HasMetadata> void logWarnIfResourceVersionPresent(P primary) {
     if (primary.getMetadata().getResourceVersion() != null) {
       log.warn(