test(ivy): ngcc - test compiling the Angular Material library (#26403)

* rename test helper script
* add material to the ngcc integration test
* add MatButton to ngcc integration test checks
* remove platform-server from ngcc integration test
  This package does not yet compile as it contains a package-private
  (internal) decorated class, which the ngcc compiler does not yet
  handle.

PR Close #26403

integration/ngcc/src/main.ts

@@ -1,9 +1,11 @@
 import {Component, NgModule, ɵrenderComponent as renderComponent} from '@angular/core';
 import {CommonModule} from '@angular/common';
+import {MatButtonModule} from '@angular/material/button';
+
 @Component({
   selector: 'hello-world',
   template: `
-    <button (click)="visible = true">See Message</button>
+    <button mat-button (click)="visible = true">See Message</button>
     <h2 *ngIf="visible">Hello World</h2>
   `,
 })
@@ -13,7 +15,7 @@ class HelloWorld {
 
 @NgModule({
   declarations: [HelloWorld],
-  imports: [CommonModule],
+  imports: [CommonModule, MatButtonModule],
 })
 class Module {}