message: test(ivy): update root causes for stepper
  Removes the stepper-related tests from the blocklist which were fixed by
  PR Close
diff: @@ -41,34 +41,6 @@ window.testBlocklist = {
  "error": "Error: Failed: Expected node descendant num to be 2 but was 0",
  "notes": "Breaking change: Content queries and descendants flag (fix test by removing <div> in NestedCdkTreeAppWithToggle)"
  },
  - "MatStepper basic stepper should go to previous available step when the previous button is clicked": {
  - "error": "TypeError: Cannot read property 'nativeElement' of undefined",
  - "notes": "Unknown"
  - },
  - "MatStepper basic stepper should focus next step header if focus is inside the stepper": {
  - "error": "Error: Expected spy focus to have been called.",
  - "notes": "Unknown"
  - },
  - "MatStepper basic stepper should only be able to return to a previous step if it is editable": {
  - "error": "TypeError: Cannot read property 'nativeElement' of undefined",
  - "notes": "Unknown"
  - },
  - "MatStepper linear stepper should not move to next step if current step is pending": {
  - "error": "TypeError: Cannot read property 'nativeElement' of undefined",
  - "notes": "Unknown"
  - },
  - "MatStepper stepper with error state should show error state": {
  - "error": "TypeError: Cannot read property 'nativeElement' of undefined",
  - "notes": "Unknown"
  - },
  - "MatStepper stepper with error state should respect a custom falsy hasError value": {
  - "error": "TypeError: Cannot read property 'nativeElement' of undefined",
  - "notes": "Unknown"
  - },
  - "MatStepper stepper using Material UI Guideline logic should show done state when step is completed and its not the current step": {
  - "error": "TypeError: Cannot read property 'nativeElement' of undefined",
  - "notes": "Unknown"
  - },
  "MatSidenav should be fixed position when in fixed mode": {
  "error": "Error: Expected ng-tns-c22979-0 ng-trigger ng-trigger-transform mat-drawer mat-sidenav mat-drawer-over ng-star-inserted to contain 'mat-sidenav-fixed'.",
  "notes": "FW-1132: Host class bindings don't work if super class has host class bindings"
  @@ -93,10 +65,6 @@ window.testBlocklist = {
  "error": "Error: Expected 0 to be 3, 'Expect node expanded'.",
  "notes": "1) Breaking change: Content queries and descendants flag (fix test by removing <div> in NestedMatTreeAppWithToggle) - 2) Breaking change: Ivy inherits metadata from superclasses (remove (click) in MatTreeNodeToggle)"
  },
  - "MatInput with textarea autosize should work in a step": {
  - "error": "TypeError: Cannot read property 'getBoundingClientRect' of null",
  - "notes": "Unknown"
  - },
  "Dialog should set the proper animation states": {
  "error": "TypeError: Cannot read property 'componentInstance' of null",
  "notes": "FW-1059: DebugNode.query should query nodes in the logical tree"
  