refactor(ivy): revert onChanges change back to a feature (#28187)

- adds fixmeIvy annotation to tests that should remain updated so we can resolve those issues in the subsequent commits

PR Close #28187

packages/core/src/render3/context_discovery.ts

@@ -12,7 +12,6 @@ import {LContext, MONKEY_PATCH_KEY_NAME} from './interfaces/context';
 import {TNode, TNodeFlags} from './interfaces/node';
 import {RElement} from './interfaces/renderer';
 import {CONTEXT, HEADER_OFFSET, HOST, LView, TVIEW} from './interfaces/view';
-import {unwrapOnChangesDirectiveWrapper} from './onchanges_util';
 import {getComponentViewByIndex, getNativeByTNode, readElementValue, readPatchedData} from './util';
 
 
@@ -258,7 +257,7 @@ function findViaDirective(lView: LView, directiveInstance: {}): number {
     const directiveIndexStart = tNode.directiveStart;
     const directiveIndexEnd = tNode.directiveEnd;
     for (let i = directiveIndexStart; i < directiveIndexEnd; i++) {
-      if (unwrapOnChangesDirectiveWrapper(lView[i]) === directiveInstance) {
+      if (lView[i] === directiveInstance) {
         return tNode.index;
       }
     }