[New Rule] AWS S3 Bucket Enumeration or Brute Force (#3635)

* [New Rule] AWS S3 Bucket Enumeration or Brute Force
Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
---------

Co-authored-by: brokensound77 <brokensound77@users.noreply.github.com>
Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>

(cherry picked from commit 54ff270)

detection_rules/rule.py

@@ -595,8 +595,11 @@ def validate(self, data: 'QueryRuleData', meta: RuleMeta) -> None:
         raise NotImplementedError()
 
     @cached
-    def get_required_fields(self, index: str) -> List[dict]:
+    def get_required_fields(self, index: str) -> List[Optional[dict]]:
         """Retrieves fields needed for the query along with type information from the schema."""
+        if isinstance(self, ESQLValidator):
+            return []
+
         current_version = Version.parse(load_current_package_version(), optional_minor_and_patch=True)
         ecs_version = get_stack_schemas()[str(current_version)]['ecs']
         beats_version = get_stack_schemas()[str(current_version)]['beats']