Add BuildThunksApiEndpointMutation type

- This was done to help split the `ApiEndpointMutation` type into multiple types instead of merging multiple `interface` declarations.

Author: aryaemami59

packages/toolkit/src/query/core/buildThunks.ts

@@ -19,6 +19,7 @@ import type {
   AssertTagTypes,
   EndpointDefinition,
   EndpointDefinitions,
+  MutationDefinition,
   QueryArgFrom,
   QueryDefinition,
   ResultTypeFrom,
@@ -48,6 +49,10 @@ export type BuildThunksApiEndpointQuery<
   Definition extends QueryDefinition<any, any, any, any, any>,
 > = Matchers<QueryThunk, Definition>
 
+export type BuildThunksApiEndpointMutation<
+  Definition extends MutationDefinition<any, any, any, any, any>,
+> = Matchers<MutationThunk, Definition>
+
 type EndpointThunk<
   Thunk extends QueryThunk | MutationThunk,
   Definition extends EndpointDefinition<any, any, any, any>,

packages/toolkit/src/query/core/module.ts

@@ -35,9 +35,8 @@ import { buildSelectors } from './buildSelectors'
 import type { SliceActions } from './buildSlice'
 import { buildSlice } from './buildSlice'
 import type {
+  BuildThunksApiEndpointMutation,
   BuildThunksApiEndpointQuery,
-  Matchers,
-  MutationThunk,
 } from './buildThunks'
 import { buildThunks } from './buildThunks'
 import { createSelector as _createSelector } from './rtkImports'
@@ -87,7 +86,7 @@ export interface ApiEndpointMutation<
   Definition extends MutationDefinition<any, any, any, any, any>,
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
   Definitions extends EndpointDefinitions,
-> extends Matchers<MutationThunk, Definition> {
+> extends BuildThunksApiEndpointMutation<Definition> {
   initiate: StartMutationActionCreator<Definition>
 
   select: MutationResultSelectorFactory<