Expose ApolloServerOptions* interfaces (#7311)

The fine-grained `ApolloServerOptions*` types form the top-level
`ApolloServerOptions` type can be useful to library authors. This commit
exports these types as part of Apollo Server's public API.

.changeset/fluffy-rats-fail.md

@@ -0,0 +1,5 @@
+---
+'@apollo/server': patch
+---
+
+Export intermediate ApolloServerOptions\* types

packages/server/src/externalTypes/constructor.ts

@@ -106,23 +106,23 @@ interface ApolloServerOptionsBase<TContext extends BaseContext> {
   __testing_incrementalExecutionResults?: GraphQLExperimentalIncrementalExecutionResults;
 }
 
-interface ApolloServerOptionsWithGateway<TContext extends BaseContext>
+export interface ApolloServerOptionsWithGateway<TContext extends BaseContext>
   extends ApolloServerOptionsBase<TContext> {
   gateway: GatewayInterface;
   schema?: undefined;
   typeDefs?: undefined;
   resolvers?: undefined;
 }
 
-interface ApolloServerOptionsWithSchema<TContext extends BaseContext>
+export interface ApolloServerOptionsWithSchema<TContext extends BaseContext>
   extends ApolloServerOptionsBase<TContext> {
   schema: GraphQLSchema;
   gateway?: undefined;
   typeDefs?: undefined;
   resolvers?: undefined;
 }
 
-interface ApolloServerOptionsWithTypeDefs<TContext extends BaseContext>
+export interface ApolloServerOptionsWithTypeDefs<TContext extends BaseContext>
   extends ApolloServerOptionsBase<TContext> {
   // These two options are always only passed directly through to
   // makeExecutableSchema. (If you don't want to use makeExecutableSchema, pass

packages/server/src/externalTypes/index.ts

@@ -43,6 +43,10 @@ export type {
   ApolloConfig,
   PersistedQueryOptions,
   CSRFPreventionOptions,
+  ApolloServerOptionsWithSchema,
+  ApolloServerOptionsWithTypeDefs,
+  ApolloServerOptionsWithStaticSchema,
+  ApolloServerOptionsWithGateway,
   ApolloServerOptions,
 } from './constructor.js';