fix(PPDSC-2661): add controlled prop to Select

[mutebg]

PPDSC-2661

What

1. Background - Depending on the use-case is possible that the component switches from uncontrolled and controlled. For example, when you want to have a controlled component without initial value ( since there is no value as "selected' it goes to uncontrolled mode ) and later you set value via <SelectOption selected /> that causes warning that components switches between modes.
2. What did you do - added controlled prop which forces the select to be in controlled mode
3. What does the reviewers should expect

I have done:

• Written unit tests against changes
• Written functional tests against the component and/or NewsKit site
• Updated relevant documentation

I have tested manually:

• The feature's functionality is working as expected on Chrome, Firefox, Safari and Edge
• The screen reader reads and flows through the elements as expected.
• There are no new errors in the browser console coming from this PR.
• When visual test is not added, it renders correctly on different browsers and mobile viewports (Safari, Firefox, small mobile viewport, tablet)
• The Playground feature is working as expected

Before:

After:

Who should review this PR:

How to test:

[newskit-engineering]

You can preview these changes on:
Documentation Site: http://ncu-newskit-docs.s3-website-eu-west-1.amazonaws.com/ppdsc-2661-controlled-select-no-selected
Storybook: http://ncu-newskit-docs.s3-website-eu-west-1.amazonaws.com/ppdsc-2661-controlled-select-no-selected/storybook

[Xin00163]

Suggested change

	description: `Force Select component to controlled`,
	description: `Force Select component to be controlled`,