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/Settings/SettingsScreen/View/SettingsScreen.swift

@@ -56,7 +56,7 @@ struct SettingsScreen: View {
                                             name: context.viewState.userDisplayName,
                                             contentID: context.viewState.userID,
                                             avatarSize: .user(on: .settings),
-                                            imageProvider: context.imageProvider)
+                                            mediaProvider: context.mediaProvider)
                             .accessibilityHidden(true)
                         
                         VStack(alignment: .leading, spacing: 2) {