@kbn/std: fix pick method to work for objects without prototypes (#183697)

## Summary

Related to https://github.com/elastic/kibana/issues/7104
Extracted from https://github.com/elastic/kibana/pull/123748

`http2` headers are created via `Object.create(null)`, which causes
issues with the way our `pick` method was implemented. PR fixes it.

packages/kbn-std/src/pick.test.ts

@@ -0,0 +1,35 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { pick } from './pick';
+
+describe('pick', () => {
+  it('works with object created inline', () => {
+    const obj = { foo: 'bar', hello: 'dolly' };
+
+    const result = pick(obj, ['foo']);
+    expect(result).toEqual({ foo: 'bar' });
+  });
+
+  it('works with objects created via Object.create(null)', () => {
+    const obj = Object.create(null);
+    Object.assign(obj, { foo: 'bar', hello: 'dolly' });
+
+    const result = pick(obj, ['foo']);
+    expect(result).toEqual({ foo: 'bar' });
+  });
+
+  it('does not pick properties from the prototype', () => {
+    const proto = { prot: 'o' };
+    const obj = Object.create(proto);
+    Object.assign(obj, { foo: 'bar', hello: 'dolly' });
+
+    const result = pick(obj, ['foo', 'prot']);
+    expect(result).toEqual({ foo: 'bar' });
+  });
+});

packages/kbn-std/src/pick.ts

@@ -8,10 +8,9 @@
 
 export function pick<T extends object, K extends keyof T>(obj: T, keys: readonly K[]): Pick<T, K> {
   return keys.reduce((acc, key) => {
-    if (obj.hasOwnProperty(key)) {
+    if (Object.hasOwn(obj, key)) {
       acc[key] = obj[key];
     }
-
     return acc;
   }, {} as Pick<T, K>);
 }