Add AppAttestManager to use AppAttest to acquire the Backup entitlement for TestFlight builds

Author: sashaweiss-signal

Signal/src/ViewControllers/AppSettings/Internal/InternalSettingsViewController.swift

@@ -155,6 +155,18 @@ class InternalSettingsViewController: OWSTableViewController2 {
                     !BackupAttachmentDownloadEligibility.disableTransitTierDownloadsOverride
             }
         ))
+        backupsSection.add(.actionItem(withText: "Acquire Backup entitlement sans StoreKit") { [weak self] in
+            Task {
+                let backupTestFlightEntitlementManager = DependenciesBridge.shared.backupTestFlightEntitlementManager
+
+                do {
+                    try await backupTestFlightEntitlementManager.acquireEntitlement()
+                    self?.presentToast(text: "Successfully acquired Backup entitlement!")
+                } catch {
+                    self?.presentToast(text: "Failed to acquired Backup entitlement! \(error)")
+                }
+            }
+        })
 
         if backupsSection.items.isEmpty.negated {
             contents.add(backupsSection)

SignalServiceKit/Network/API/Requests/TSRequest.swift

@@ -31,12 +31,16 @@ public struct TSRequest: CustomDebugStringConvertible {
     }
 
     public init(url: URL, method: String = "GET", parameters: [String: Any]? = [:]) {
+        self.init(url: url, method: method, body: .parameters(parameters ?? [:]))
+    }
+
+    public init(url: URL, method: String, body: Body) {
         owsAssertDebug(method.isEmpty.negated)
 
         self.url = url
         self.method = method
         self.headers = HttpHeaders()
-        self.body = .parameters(parameters ?? [:])
+        self.body = body
     }
 
     // MARK: - Authorization