Jest doesn't mock properties inherited from the last object in the prototype chain

[rubennorte]

🐛 Bug Report

Jest doesn't mock the properties in the last component of the prototype chain (even if it's not Object).

To Reproduce

Steps to reproduce the behavior:

const jestMock = require('jest-mock');

const Foo = Object.assign(Object.create(null), { foo() {} });
const Bar = Object.assign(Object.create(Foo), { bar() {} });

const BarMock = jestMock.generateFromMetadata(jestMock.getMetadata(Bar));
typeof BarMock.foo; // 'undefined'
typeof BarMock.bar; // 'function'

Expected behavior

const jestMock = require('jest-mock');

const Foo = Object.assign(Object.create(null), { foo() {} });
const Bar = Object.assign(Object.create(Foo), { bar() {} });

const BarMock = jestMock.generateFromMetadata(jestMock.getMetadata(Bar));
typeof BarMock.foo; // 'function'
typeof BarMock.bar; // 'function'

[rubennorte]

I'll fix this in the same PR I'll fix #6995

[github-actions]

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