Add callback assert

[cristianooliveira]

Description

Add callback assert.
This assert adds more context to the callback error as suggested by @franciscocardoso.

Steps to reproduce or test

When:

Assert.callback(() => {});

The error should be:

{
  "__class__": "Callback",
  "__parentClass__": "Assert"
}

Now when:

Assert.callback(() => {}, 'CustomClass');

{
  "__class__": "CustomClass",
  "__parentClass__": "Assert"
}

Checklist

• Commits are atomic and logically separated.
• Performance implications have been considered.
• Security implications have been considered.
• Local tests run successfully and the new code has good coverage.