refactor(ivy): remove type from DirectiveDef (#21374)

This change makes the code cleaner for the user. It does mean
a little bit more work for us since we have to patch the `type` back
into the `DirectiveDef`. However since the patching happens only once
on startup it should not be significant.

PR Close #21374

packages/core/test/render3/basic_perf.ts

@@ -32,7 +32,6 @@ describe('iv perf test', () => {
       it(`${iteration}. create ${count} divs in Render3`, () => {
         class Component {
           static ngComponentDef = defineComponent({
-            type: Component,
             tag: 'div',
             template: function Template(ctx: any, cm: any) {
               if (cm) {