RTDB exposes wrong error message when performing `get` on a path blocked by security rules

[maneesht]

Description

When calling getData on a path, say /a/b, and / is set to deny reads, the SDK responds with

Unable to get latest value for query FQuerySpec (path: /a/b, params: {
}), client offline with no active listeners and no matching disk cache entries

Instead of sending back this opaque error message, we should read the response that comes back from the server after the get

Relevant Code:
https://github.com/firebase/firebase-ios-sdk/blob/a885d5e023b04273fcce525e1ae236283845d774/FirebaseDatabase/Sources/Core/FRepo.m#L548C14-L548C14

Reproducing the issue

No response

Firebase SDK Version

10.9

Xcode Version

14.3

Installation Method

Swift Package Manager

Firebase Product(s)

Database

Targeted Platforms

All

Relevant Log Output

No response

If using Swift Package Manager, the project's Package.resolved

No response

If using CocoaPods, the project's Podfile.lock

No response