[BUG] The emptyStateIcon causes unit tests to fail

[Fewwy]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behaviour:

1. Writing a basic shallow snapshot test for the class that has RuleTable inside of it

const wrapper = shallow(<My Component  {...some props}/>) 
 it('component renders correctly', () => {
    expect(wrapper).toMatchSnapshot();
  });

3. The test is failing because

Failed prop type: Invalid prop `emptyStateIcon` supplied to `RuleTable`, expected a ReactNode.
        in RuleTable

4. I tried to solve it but the only way that helped is actually removing
   emptyStateIcon: SearchIcon
   from line 284

Expected behavior
Tests are working :)

Desktop (please complete the following information):

• OS: Fedora 33
• Browser Chrome Version 92.0.4515.131 (Official Build) (64-bit)

Additional context

[rvsia]

Thank you for noticing this! There is a wrong proptype, fixed here: https://github.com/RedHatInsights/frontend-components/pull/1237/files