refactor(core): profiler takes null as a default instance (#59233)

Several profiler calls don't have any meaningful instance when
producing a profiling event. This commit changes the default
instance value to null to sreamline profiler invocations.

PR Close #59233

devtools/projects/ng-devtools-backend/src/lib/hooks/profiler/native.ts

@@ -43,7 +43,7 @@ export class NgProfiler extends Profiler {
 
   private _initialize(): void {
     ngDebugClient().ɵsetProfiler(
-      (event: ɵProfilerEvent, instanceOrLView: {} | null, hookOrListener: any) =>
+      (event: ɵProfilerEvent, instanceOrLView: {} | null = null, hookOrListener: any) =>
         this._callbacks.forEach((cb) => cb(event, instanceOrLView, hookOrListener)),
     );
   }

packages/core/src/render3/profiler.ts

@@ -33,7 +33,7 @@ export const setProfiler = (profiler: Profiler | null) => {
  *  execution context
  * @returns
  */
-export const profiler: Profiler = function (event, instance, hookOrListener) {
+export const profiler: Profiler = function (event, instance = null, hookOrListener) {
   if (profilerCallback != null /* both `null` and `undefined` */) {
     profilerCallback(event, instance, hookOrListener);
   }

packages/core/src/render3/profiler_types.ts

@@ -160,5 +160,5 @@ export const enum ProfilerEvent {
  * Profiler function which the runtime will invoke before and after user code.
  */
 export interface Profiler {
-  (event: ProfilerEvent, instance: {} | null, hookOrListener?: (e?: any) => any): void;
+  (event: ProfilerEvent, instance?: {} | null, hookOrListener?: (e?: any) => any): void;
 }