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/CreateRoom/View/CreateRoomScreen.swift

@@ -130,7 +130,7 @@ struct CreateRoomScreen: View {
         ScrollView(.horizontal, showsIndicators: false) {
             LazyHStack(spacing: 16) {
                 ForEach(context.viewState.selectedUsers, id: \.userID) { user in
-                    InviteUsersScreenSelectedItem(user: user, imageProvider: context.imageProvider) {
+                    InviteUsersScreenSelectedItem(user: user, mediaProvider: context.mediaProvider) {
                         context.send(viewAction: .deselectUser(user))
                     }
                     .frame(width: invitedUserCellWidth)