fix(core): do not insert todo when migrating void @output

The following:

`@Output() someChange = new EventEmitter<void>();`

is correctly migrated to:

`readonly someChange = output<void>();`

However, a TODO is incorrectly inserted for subsequent emissions from
`someChange`, stating that an argument is expected.

Author: tmpln

packages/core/schematics/migrations/output-migration/output-migration.spec.ts

@@ -198,6 +198,35 @@ describe('outputs', () => {
         });
       });
 
+      it('should not insert a TODO comment for emit function with void type', async () => {
+        await verify({
+          before: `
+              import {Directive, Output, EventEmitter} from '@angular/core';
+
+              @Directive()
+              export class TestDir {
+                @Output() someChange = new EventEmitter<void>();
+
+                someMethod(): void {
+                  this.someChange.emit();
+                }
+              }
+            `,
+          after: `
+              import {Directive, output} from '@angular/core';
+
+              @Directive()
+              export class TestDir {
+                readonly someChange = output<void>();
+
+                someMethod(): void {
+                  this.someChange.emit();
+                }
+              }
+            `,
+        });
+      });
+
       it('should insert a TODO comment for emit function with type', async () => {
         await verify({
           before: `

packages/core/schematics/migrations/output-migration/output-migration.ts

@@ -477,7 +477,7 @@ function addCommentForEmptyEmit(
   if (!propertyDeclaration) return;
 
   const eventEmitterType = getEventEmitterArgumentType(propertyDeclaration);
-  if (!eventEmitterType) return;
+  if (!eventEmitterType || eventEmitterType === 'void') return;
 
   const id = getUniqueIdForProperty(info, propertyDeclaration);
   const file = projectFile(node.getSourceFile(), info);