fix(ivy): semantic module check incorrectly handles nested arrays (#30993)

In View Engine, developers can pass bootstrap and entry components
as nested arrays. e.g.

```ts
export const MyOtherEntryComponents = [A, B, C]

@NgModule({
  entryComponents: [MyComp, MyOtherEntryComponents]
})
```

Currently using nested arrays for these properties causes
unexpected errors to be reported in Ivy since the semantic
NgModule checks aren't properly recursing into the nested
entry/bootstrap components. This issue has been unveiled by
enabling the strict function parameter checks.

PR Close #30993

packages/core/test/acceptance/ng_module_spec.ts

@@ -0,0 +1,77 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {Component, NgModule} from '@angular/core';
+import {TestBed} from '@angular/core/testing';
+
+describe('NgModule', () => {
+  @Component({template: 'hello'})
+  class TestCmp {
+  }
+
+  @Component({template: 'hello'})
+  class TestCmp2 {
+  }
+
+  describe('entryComponents', () => {
+    it('should throw when specified entry component is not added to a module', () => {
+      @NgModule({entryComponents: [TestCmp, [TestCmp2]]})
+      class MyModule {
+      }
+
+      TestBed.configureTestingModule({imports: [MyModule]});
+
+      expect(() => {
+        TestBed.createComponent(TestCmp);
+        TestBed.createComponent(TestCmp2);
+      }).toThrowError(/not part of any NgModule/);
+    });
+
+    it('should not throw when specified entry component is added to a module', () => {
+      @NgModule({declarations: [TestCmp, TestCmp2], entryComponents: [TestCmp, [TestCmp2]]})
+      class MyModule {
+      }
+
+      TestBed.configureTestingModule({imports: [MyModule]});
+
+      expect(() => {
+        TestBed.createComponent(TestCmp);
+        TestBed.createComponent(TestCmp2);
+      }).not.toThrow();
+    });
+  });
+
+  describe('bootstrap', () => {
+    it('should throw when specified bootstrap component is not added to a module', () => {
+      @NgModule({bootstrap: [TestCmp, [TestCmp2]]})
+      class MyModule {
+      }
+
+      TestBed.configureTestingModule({imports: [MyModule]});
+
+      expect(() => {
+        TestBed.createComponent(TestCmp);
+        TestBed.createComponent(TestCmp2);
+      }).toThrowError(/not part of any NgModule/);
+    });
+
+    it('should not throw when specified bootstrap component is added to a module', () => {
+      @NgModule({declarations: [TestCmp, TestCmp2], bootstrap: [TestCmp, [TestCmp2]]})
+      class MyModule {
+      }
+
+      TestBed.configureTestingModule({imports: [MyModule]});
+
+      expect(() => {
+        TestBed.createComponent(TestCmp);
+        TestBed.createComponent(TestCmp2);
+      }).not.toThrow();
+    });
+  });
+
+});