Automatically try reloading failed images on network changes (#3170)

* Add the networkMonitor to the NSE and delete the old MockMediaLoader

* Generate a MediaLoaderMock through AutoMockable and use it in the MediaProviderTests

* Implement an ImageProvider mechanism that automatically tries reloading images when connectivity is established again and use it for LoadableImages

* Merge the ImageProvider protocol back into the MediaProvider

* Address PR review comments

* Provide a default sdk client request configuration

* Address tasks not automatically cancelling themselves when views get deallocated

ElementX/Sources/Screens/GlobalSearchScreen/GlobalSearchScreenViewModel.swift

@@ -28,11 +28,11 @@ class GlobalSearchScreenViewModel: GlobalSearchScreenViewModelType, GlobalSearch
     }
 
     init(roomSummaryProvider: RoomSummaryProviderProtocol,
-         imageProvider: ImageProviderProtocol) {
+         mediaProvider: MediaProviderProtocol) {
         self.roomSummaryProvider = roomSummaryProvider
         
         super.init(initialViewState: GlobalSearchScreenViewState(bindings: .init(searchQuery: "")),
-                   imageProvider: imageProvider)
+                   mediaProvider: mediaProvider)
         
         roomSummaryProvider.roomListPublisher
             .receive(on: DispatchQueue.main)