refactor(core): optimize the implementation about finding context from error in ErrorHandler (#42581)

in _findContext method, use conditional operator  check whether the params 'error' exists and then use nullish coalescing operator instead conditional operator when getDebugContext's result does not exist.

PR Close #42581

packages/core/src/error_handler.ts

@@ -59,12 +59,7 @@ export class ErrorHandler {
 
   /** @internal */
   _findContext(error: any): any {
-    if (error) {
-      return getDebugContext(error) ? getDebugContext(error) :
-                                      this._findContext(getOriginalError(error));
-    }
-
-    return null;
+    return !error ? null : getDebugContext(error) ?? this._findContext(getOriginalError(error));
   }
 
   /** @internal */