docs: Fix the comment for ignore_null field to clarify its applicab…

…ility on data quality rules

---
docs:Added documentation of page_size default and maximum value for ListEntries and RetrieveAspects
PiperOrigin-RevId: 594334510

google/cloud/dataplex/v1/data_quality.proto

@@ -358,7 +358,12 @@ message DataQualityRule {
   // `ignore_null` is `true`. In that case, such `null` rows are trivially
   // considered passing.
   //
-  // This field is only valid for row-level type rules.
+  // This field is only valid for the following type of rules:
+  //
+  // * RangeExpectation
+  // * RegexExpectation
+  // * SetExpectation
+  // * UniquenessExpectation
   bool ignore_null = 501 [(google.api.field_behavior) = OPTIONAL];
 
   // Required. The dimension a rule belongs to. Results are also aggregated at