[Button] Remove mouse click focus state

[th-94]

Prerequisites

• I have searched for duplicate or closed issues
• I have read the contributing guidelines

Describe the issue

When mouse clicking on the button, the focus state is activated unexpectedly. The focus state should active when its by keyboard event.

What operating system(s) are you seeing the problem on?

macOS

What browser(s) are you seeing the problem on?

No response

Describe your frontend stack. What version of React and @govtechsg/sgds-web-component are you using? CSR or SSR?

3.24.0