message: Adds more explanation in the changeset about the action and onClick props
diff: Adds onClick and other props to IconLinkVertical
  Allows TriggerButton component to render when pager duty key is missing
  Refactors TriggerButton and PagerDutyCard not to have shared state
  +Removes the `action` prop of the IconLinkVertical component while adding `onClick`. So instead of having an action including a button with onClick, now the whole component can be clickable making it easier to implement and having a better UX. Before:
  +
  +```ts
  +const myLink : IconLinkVerticalProps = {
  + label: 'Click me',
  + action: <Button onClick={myAction} />,
  + icon: <MyIcon onClick={myAction} />,
  +}
  +```
  +
  +After:
  +
  +```ts
  +const myLink : IconLinkVerticalProps = {
  + label: 'Click me',
  + onClick: myAction,
  + icon: <MyIcon />,
  +}
  +```
  \ No newline at end of file
  