refactor(core): Generalize binary data manager interface (no-changelog) (#7164)

Depends on: #7092 | Story:
[PAY-768](https://linear.app/n8n/issue/PAY-768)

This PR: 
- Generalizes the `IBinaryDataManager` interface.
- Adjusts `Filesystem.ts` to satisfy the interface.
- Sets up an S3 client stub to be filled in in the next PR.
- Turns `BinaryDataManager` into an injectable service.
- Adjusts the config schema and adds new validators.

Note that the PR looks large but all the main changes are in
`packages/core/src/binaryData`.

Out of scope:
- `BinaryDataManager` (now `BinaryDataService`) and `Filesystem.ts` (now
`fs.client.ts`) were slightly refactored for maintainability, but fully
overhauling them is **not** the focus of this PR, which is meant to
clear the way for the S3 implementation. Future improvements for these
two should include setting up a backwards-compatible dir structure that
makes it easier to locate binary data files to delete, removing
duplication, simplifying cloning methods, using integers for binary data
size instead of `prettyBytes()`, writing tests for existing binary data
logic, etc.

---------

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

packages/cli/src/databases/repositories/execution.repository.ts

@@ -10,7 +10,7 @@ import type {
 import { parse, stringify } from 'flatted';
 import { LoggerProxy as Logger } from 'n8n-workflow';
 import type { IExecutionsSummary, IRunExecutionData } from 'n8n-workflow';
-import { BinaryDataManager } from 'n8n-core';
+import { BinaryDataService } from 'n8n-core';
 import type {
 	ExecutionPayload,
 	IExecutionBase,
@@ -89,6 +89,7 @@ export class ExecutionRepository extends Repository<ExecutionEntity> {
 	constructor(
 		dataSource: DataSource,
 		private readonly executionDataRepository: ExecutionDataRepository,
+		private readonly binaryDataService: BinaryDataService,
 	) {
 		super(ExecutionEntity, dataSource.manager);
 
@@ -520,8 +521,7 @@ export class ExecutionRepository extends Repository<ExecutionEntity> {
 			})
 		).map(({ id }) => id);
 
-		const binaryDataManager = BinaryDataManager.getInstance();
-		await binaryDataManager.deleteBinaryDataByExecutionIds(executionIds);
+		await this.binaryDataService.deleteManyByExecutionIds(executionIds);
 
 		this.logger.debug(`Hard-deleting ${executionIds.length} executions from database`, {
 			executionIds,