test(angular): remove routing waits in tests (#28532)

Issue number: N/A

---------

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## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->

Our Angular E2E tests are brittle because they rely on arbitrary
`cy.wait` calls to account for asynchronous routing. This leads to flaky
tests on CI and seemingly random test failures when we make adjustments
to the Ionic Anguar routing integration (see:
#28188)

Additionally, our test execution for the navigation tests is quite slow
because transitions are enabled. As a result, we need to wait hundreds
of ms per test just for the transitions to finish.

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- Updated the `testStack` command to use a new `getStack` [Cypress
query](https://docs.cypress.io/api/cypress-api/custom-queries). These
queries come with automatic retrying built-in. By leveraging this query
in the `testStack` command, we can avoid the arbitrary waits.
- Added `ionic:_testing=true` query strings to the navigation tests.
This causes Ionic to disable any transitions so the tests execute
faster.
- Removed most of the arbitrary `cy.wait` calls. I kept the swipe to go
back `cy.wait` -- I wasn't quite sure how to reduce flakiness on that
one.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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and migration path for existing applications below. -->


## Other information

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screenshots of how the component looks before and after the change. -->

packages/angular/test/base/cypress/support/commands.js

@@ -41,11 +41,21 @@ Cypress.Commands.add('ionSwipeToGoBack', (complete = false, selector = 'ion-rout
   cy.wait(150);
 });
 
+/**
+ * getStack is a query because it has automatic
+ * retries built in which will let us account for
+ * async routing without having to use
+ * arbitrary cy.wait calls.
+ */
+Cypress.Commands.addQuery('getStack', (selector) => {
+  return () => {
+    const el = cy.$$(selector);
+    return Array.from(el.children()).map((el) => el.tagName.toLowerCase());
+  }
+});
+
 Cypress.Commands.add('testStack', (selector, expected) => {
-  cy.document().then((doc) => {
-    const children = Array.from(doc.querySelector(selector).children).map((el) => el.tagName.toLowerCase());
-    expect(children).to.deep.equal(expected);
-  });
+  cy.getStack(selector).should('deep.equal', expected);
 });
 
 Cypress.Commands.add('testLifeCycle', (selector, expected) => {

packages/angular/test/base/e2e/src/lazy/navigation.spec.ts

@@ -1,11 +1,9 @@
 describe('Navigation', () => {
   beforeEach(() => {
-    cy.visit('/lazy/navigation');
+    cy.visit('/lazy/navigation/page1?ionic:_testing=true');
   })
 
   it('should navigate correctly', () => {
-    cy.visit('/lazy/navigation/page1');
-    cy.wait(2000);
     cy.testStack('ion-router-outlet', ['app-navigation-page2', 'app-navigation-page1']);
 
     cy.get('app-navigation-page2').should('have.attr', 'aria-hidden').and('equal', 'true');

packages/angular/test/base/e2e/src/lazy/nested-outlet.spec.ts

@@ -1,6 +1,6 @@
 describe('Nested Outlet', () => {
   beforeEach(() => {
-    cy.visit('/lazy/nested-outlet/page');
+    cy.visit('/lazy/nested-outlet/page?ionic:_testing=true');
   })
 
   it('should navigate correctly', () => {

packages/angular/test/base/e2e/src/lazy/router-link.spec.ts

@@ -1,6 +1,6 @@
 describe('Router Link', () => {
   beforeEach(() => {
-    cy.visit('/lazy/router-link');
+    cy.visit('/lazy/router-link?ionic:_testing=true');
   });
 
   describe('router-link params and fragments', () => {
@@ -9,7 +9,6 @@ describe('Router Link', () => {
     const id = 'MyPageID==';
 
     it('should go to a page with properly encoded values', () => {
-      cy.visit('/lazy/router-link?ionic:_testing=true');
       cy.get('#queryParamsFragment').click();
 
       const expectedPath = `${encodeURIComponent(id)}`;
@@ -24,7 +23,6 @@ describe('Router Link', () => {
     });
 
     it('should return to a page with preserved query param and fragment', () => {
-      cy.visit('/lazy/router-link?ionic:_testing=true');
       cy.get('#queryParamsFragment').click();
       cy.get('#goToPage3').click();
 
@@ -148,7 +146,6 @@ function testForward() {
 }
 
 function testRoot() {
-  cy.wait(200);
   cy.testStack('ion-router-outlet', ['app-router-link-page']);
   cy.testLifeCycle('app-router-link-page', {
     ionViewWillEnter: 1,
@@ -159,7 +156,6 @@ function testRoot() {
   cy.get('app-router-link-page #canGoBack').should('have.text', 'false');
 
   cy.go('back');
-  cy.wait(100);
   cy.testStack('ion-router-outlet', ['app-router-link']);
   cy.testLifeCycle('app-router-link', {
     ionViewWillEnter: 1,
@@ -170,7 +166,6 @@ function testRoot() {
 }
 
 function testBack() {
-  cy.wait(500);
   cy.testStack('ion-router-outlet', ['app-router-link-page']);
   cy.testLifeCycle('app-router-link-page', {
     ionViewWillEnter: 1,
@@ -181,7 +176,6 @@ function testBack() {
   cy.get('app-router-link-page #canGoBack').should('have.text', 'false');
 
   cy.go('back');
-  cy.wait(100);
   cy.testStack('ion-router-outlet', ['app-router-link']);
   cy.testLifeCycle('app-router-link', {
     ionViewWillEnter: 1,