[Backport 8.17] Allow string for total_fields index settings (#3225)

(cherry picked from commit cec582a)

Co-authored-by: Quentin Pradet <[email protected]>

specification/indices/_types/IndexSettings.ts

@@ -430,7 +430,7 @@ export class MappingLimitSettingsTotalFields {
    * degradations and memory issues, especially in clusters with a high load or few resources.
    * @server_default 1000
    */
-  limit?: long
+  limit?: long | string
   /**
    * This setting determines what happens when a dynamically mapped field would exceed the total fields limit. When set
    * to false (the default), the index request of the document that tries to add a dynamic field to the mapping will fail
@@ -439,7 +439,7 @@ export class MappingLimitSettingsTotalFields {
    * The fields that were not added to the mapping will be added to the _ignored field.
    * @server_default false
    */
-  ignore_dynamic_beyond_limit?: boolean
+  ignore_dynamic_beyond_limit?: boolean | string
 }
 
 export class MappingLimitSettingsDepth {