Improve tests' reliability (#763)

* Create publisher extension into the unit test target

* Add ViewModelContext test extension

* Refactor BugReportViewModelTests

* Fix failing UTs

* Idea PublishedClosure

* Refactor RoomDetailsViewModelTests

* Replace more Task.yield/Task.sleep

* Move leaveRoom/ignore/unignore under the @MainActor

* Revert "Idea PublishedClosure"

This reverts commit 4ab25291041f0dbd99083baf9d95bc6647f1fd97.

* Make process(viewAction:) sync

* Refactor BugReportViewModel callback to a publisher

* Fix UTs

* Refactor ReportContentViewModel

* Fix ui test build error

* Try make sonar happy

* Empty commit

* Revert "Try make sonar happy"

This reverts commit 97804b19373a8f55f12174ccbf27f1fd8db583b7.

* Rename ui test identifier

* Cleanup

* Callback -> actions refactor

* Update template

* Add publisher in TemplateCoordinator

* Add env variable in IntegrationTests.xctestplan

* Add async sequence extension

* Amend integration test plan

* Remove env variable from target.yml

* Cleanup

* Fix failing UI tests

ElementX/Sources/Screens/Authentication/LoginScreen/LoginViewModel.swift

@@ -28,7 +28,7 @@ class LoginViewModel: LoginViewModelType, LoginViewModelProtocol {
         super.init(initialViewState: viewState)
     }
 
-    override func process(viewAction: LoginViewAction) async {
+    override func process(viewAction: LoginViewAction) {
         switch viewAction {
         case .selectServer:
             callback?(.selectServer)

ElementX/Sources/Screens/Authentication/ServerSelection/ServerSelectionViewModel.swift

@@ -28,7 +28,7 @@ class ServerSelectionViewModel: ServerSelectionViewModelType, ServerSelectionVie
                                                               isModallyPresented: isModallyPresented))
     }
 
-    override func process(viewAction: ServerSelectionViewAction) async {
+    override func process(viewAction: ServerSelectionViewAction) {
         switch viewAction {
         case .confirm:
             callback?(.confirm(homeserverAddress: state.bindings.homeserverAddress))

ElementX/Sources/Screens/Authentication/SoftLogout/SoftLogoutViewModel.swift

@@ -33,7 +33,7 @@ class SoftLogoutViewModel: SoftLogoutViewModelType, SoftLogoutViewModelProtocol
         super.init(initialViewState: viewState)
     }
     
-    override func process(viewAction: SoftLogoutViewAction) async {
+    override func process(viewAction: SoftLogoutViewAction) {
         switch viewAction {
         case .login:
             callback?(.login(state.bindings.password))