Declare ContainerRuntime class as implementing interfaces it already implements (#24147)

We've hidden the fact that ContainerRuntime class implements certain
interfaces to reduce exposure while ContainerRuntime was not internal.
Now that it is, we can declare that it implements these interfaces.

It makes the code clearer, and code navigation works better.

Author: markfields

packages/runtime/container-runtime/src/containerRuntime.ts

@@ -90,6 +90,7 @@ import type {
 	IInboundSignalMessage,
 	IRuntimeMessagesContent,
 	ISummarizerNodeWithGC,
+	IFluidParentContext,
 } from "@fluidframework/runtime-definitions/internal";
 import {
 	FlushMode,
@@ -168,6 +169,7 @@ import {
 	IGarbageCollector,
 	gcGenerationOptionName,
 	type GarbageCollectionMessage,
+	type IGarbageCollectionRuntime,
 } from "./gc/index.js";
 import { InboundBatchAggregator } from "./inboundBatchAggregator.js";
 import {
@@ -719,8 +721,10 @@ export class ContainerRuntime
 	implements
 		IContainerRuntime,
 		IRuntime,
+		IGarbageCollectionRuntime,
 		ISummarizerRuntime,
 		ISummarizerInternalsProvider,
+		IFluidParentContext,
 		IProvideFluidHandleContext,
 		IProvideLayerCompatDetails
 {

packages/runtime/container-runtime/src/gc/gcDefinitions.ts

@@ -333,6 +333,8 @@ export type GarbageCollectionMessage = ISweepMessage | ITombstoneLoadedMessage;
 
 /**
  * Defines the APIs for the runtime object to be passed to the garbage collector.
+ *
+ * @internal
  */
 export interface IGarbageCollectionRuntime {
 	/**

packages/runtime/container-runtime/src/index.ts

@@ -35,6 +35,7 @@ export {
 	IGCMetadata,
 	GCFeatureMatrix,
 	GCVersion,
+	IGarbageCollectionRuntime,
 	IGCRuntimeOptions,
 	IMarkPhaseStats,
 	ISweepPhaseStats,