refactor(docs-infra): fix docs examples for Angular-specific tslint rules (#38143)

This commit updates the docs examples to be compatible with the
following Angular-specific tslint rules:
- `component-selector`
- `directive-selector`
- `no-conflicting-lifecycle`
- `no-host-metadata-property`
- `no-input-rename`
- `no-output-native`
- `no-output-rename`

This is in preparation of updating the docs examples `tslint.json` to
match the one generated for new Angular CLI apps in a future commit.

PR Close #38143

aio/content/examples/dependency-injection-in-action/src/app/parent-finder.component.ts

@@ -1,5 +1,4 @@
-/* tslint:disable: no-unused-variable component-selector-name one-line space-before-function-paren */
-/* tslint:disable:*/
+/* tslint:disable: no-unused-variable component-selector one-line space-before-function-paren */
 // #docplaster
 // #docregion
 import { Component, forwardRef, Optional, SkipSelf } from '@angular/core';
@@ -20,8 +19,7 @@ const DifferentParent = Parent;
 // The `parentType` defaults to `Parent` when omitting the second parameter.
 // #docregion provide-the-parent
 export function provideParent
-// #enddocregion provide-parent, provide-the-parent
-// #docregion provide-parent
+// #enddocregion provide-the-parent
   (component: any, parentType?: any) {
     return { provide: parentType || Parent, useExisting: forwardRef(() => component) };
   }