Fix type error in phrase_filter.ts (#50713)

The PhraseFilter type definition incorrectly put the script property under meta when in fact the constructor has always put it at the top level.

src/plugins/data/common/es_query/filters/phrase_filter.ts

@@ -25,19 +25,19 @@ export type PhraseFilterMeta = FilterMeta & {
   params?: {
     query: string; // The unformatted value
   };
+  field?: any;
+  index?: any;
+};
+
+export type PhraseFilter = Filter & {
+  meta: PhraseFilterMeta;
   script?: {
     script: {
       source?: any;
       lang?: string;
       params: any;
     };
   };
-  field?: any;
-  index?: any;
-};
-
-export type PhraseFilter = Filter & {
-  meta: PhraseFilterMeta;
 };
 
 type PhraseFilterValue = string | number | boolean;
@@ -79,7 +79,7 @@ export const buildPhraseFilter = (
     return {
       meta: { index: indexPattern.id, field: field.name } as PhraseFilterMeta,
       script: getPhraseScript(field, value),
-    } as PhraseFilter;
+    };
   } else {
     return {
       meta: { index: indexPattern.id },

src/plugins/data/public/query/filter_manager/lib/generate_filters.ts

@@ -42,7 +42,7 @@ function getExistingFilter(
     }
 
     if (esFilters.isScriptedPhraseFilter(filter)) {
-      return filter.meta.field === fieldName && filter.meta.script!.script.params.value === value;
+      return filter.meta.field === fieldName && filter.script!.script.params.value === value;
     }
   });
 }