Strip TS type exports even when they are being renamed

[chandlerprall]

Summary

Cleans up renamed exports of TS types, such as Toast as EuiGlobalToastListToast, in toast/index.ts. There were two instances of the same bug, where the value being exported was observed instead of the local variable name.

After applying the fix & re-running babel on toast/index.ts the new output is

export { EuiToast } from './toast';
export { EuiGlobalToastList } from './global_toast_list';
export { EuiGlobalToastListItem } from './global_toast_list_item';

I also ran icon/index.ts to confirm this did not affect the existing type removal when the variable is not renamed.

Checklist

- [ ] This was checked in mobile
- [ ] This was checked in IE11
- [ ] This was checked in dark mode
- [ ] Any props added have proper autodocs
- [ ] Documentation examples were added

• A changelog entry exists and is marked appropriately
• This was checked for breaking changes and labeled appropriately
• Jest tests were updated or added to match the most common scenarios
  - [ ] This was checked against keyboard-only and screenreader scenarios
  - [ ] This required updates to Framer X components

[thompsongl]

Confirmed the expected output with local build