Refactor: Make swift concurrency core implementation - RequestPerformable

[Aldo10012]

What's the reason for this PR?

Inside of the different request performing class, we support:

• async/await & AsyncStream (Swift Concurrency)
• completion handlers
• publishers (Combine)

To prevent writing duplicate code, the completion handler method was used as the CORE implementation, and Swift concurrency and combine methods are wrappers of the completion handler method.

Apple recommends that any new async code should be written in Swift Concurrency.

What's new?

This PR focuses on RequestPerformable. Other classes will be refactored in follow up PRs.

1. Make swift concurrency method the core implementation handling networking logic,
2. Make non swift-concurrency methods be wrapper methods.
3. Replace .performTask(...) return type from URLSessionDataTask to CancellableRequest

[codecov]

Codecov Report

❌ Patch coverage is 97.26027% with 10 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...ZNetworking/Util/Performers/RequestPerformer.swift	87.87%	4 Missing ⚠️
...workingTests/SwiftTestingHelpers/Expectation.swift	96.42%	1 Missing ⚠️
...ownloader/Mocks/MockFileDownloaderURLSession.swift	0.00%	1 Missing ⚠️
...formers/Mocks/MockRequestPerformerURLSession.swift	83.33%	1 Missing ⚠️
...ataUploader/Mocks/MockDataUploaderURLSession.swift	0.00%	1 Missing ⚠️
...ileUploader/Mocks/MockFileUploaderURLSession.swift	0.00%	1 Missing ⚠️
...Util/WebSocket/Mocks/MockWebSockerURLSession.swift	0.00%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!