feat(core): Remove storeMetadata and getSize from binary data manager interface (no-changelog) (#7195)

Depends on: #7164 | Story:
[PAY-838](https://linear.app/n8n/issue/PAY-838/introduce-object-store-service-for-binary-data)

This PR removes `storeMetadata` and `getSize` from the binary data
manager interface, as these are specific to filesystem mode. Also this
disambiguates identifiers:

```
binaryDataId
filesystem:289b4aac51e-dac6-4167-b793-6d5c415e2b47 {mode}:{fileId}

fileId - FS
289b4aac51e-dac6-4167-b793-6d5c415e2b47 {executionId}{uuid}

fileId - S3
/workflows/{workflowId}/executions/{executionId}/binary_data/b4aac51e-dac6-4167-b793-6d5c415e2b47
```

Note: The object store changes originally in this PR were extracted out
into the final PR.

---------

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/workflow/src/Interfaces.ts

@@ -48,12 +48,6 @@ export interface IBinaryData {
 	id?: string;
 }
 
-export interface BinaryMetadata {
-	fileName?: string;
-	mimeType?: string;
-	fileSize: number;
-}
-
 // All properties in this interface except for
 // "includeCredentialsOnRefreshOnBody" will get
 // removed once we add the OAuth2 hooks to the
@@ -694,7 +688,11 @@ export interface BinaryHelperFunctions {
 	binaryToBuffer(body: Buffer | Readable): Promise<Buffer>;
 	getBinaryPath(binaryDataId: string): string;
 	getBinaryStream(binaryDataId: string, chunkSize?: number): Readable;
-	getBinaryMetadata(binaryDataId: string): Promise<BinaryMetadata>;
+	getBinaryMetadata(binaryDataId: string): Promise<{
+		fileName?: string;
+		mimeType?: string;
+		fileSize: number;
+	}>;
 }
 
 export interface NodeHelperFunctions {