The title prop on EuiCard is causing the onClick method to trigger twice when the title is clicked. It appears that this only happens when a React Node is passed into title instead of a string.

Steps to Reproduce:

1. View the CodeSandbox link below and make sure the console is open
2. Click on the title text ('This is a title') and notice two console.log statements for each time the title is clicked
3. Click on the card body (not the title text) and notice that there's only one console.log statement for each time the body is clicked

CodeSandbox Link: https://codesandbox.io/s/card-onclick-demo-jue9fj?file=/demo.tsx