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

UnitTests/Sources/SessionVerificationViewModelTests.swift

@@ -25,7 +25,6 @@ class SessionVerificationViewModelTests: XCTestCase {
     var context: SessionVerificationViewModelType.Context!
     var sessionVerificationController: SessionVerificationControllerProxyMock!
     
-    @MainActor
     override func setUpWithError() throws {
         sessionVerificationController = SessionVerificationControllerProxyMock.configureMock()
         viewModel = SessionVerificationViewModel(sessionVerificationControllerProxy: sessionVerificationController)
@@ -49,18 +48,14 @@ class SessionVerificationViewModelTests: XCTestCase {
         
         context.send(viewAction: .close)
         
-        await Task.yield()
-        
         XCTAssertEqual(context.viewState.verificationState, .cancelling)
         
-        try await Task.sleep(for: .milliseconds(100))
+        await context.nextViewState()
         
         XCTAssertEqual(context.viewState.verificationState, .cancelled)
         
         context.send(viewAction: .restart)
         
-        await Task.yield()
-        
         XCTAssertEqual(context.viewState.verificationState, .initial)
 
         XCTAssert(sessionVerificationController.requestVerificationCallsCount == 1)