Fixes to EuiAccordion adjust exposed height

[winnllam]

Summary

Wasn't really sure where this would merge to :)
Closes #3136, now when changing the width, the accordion adjusts for the height.

Checklist

• Check against all themes for compatibility in both light and dark modes
• Checked in mobile
• Checked in IE11 and Firefox (checked Firefox, no access to IE)
• Props have proper autodocs
• Added documentation examples
• Added or updated jest tests
• Checked for breaking changes and labeled appropriately
• Checked for accessibility including keyboard-only and screenreader modes
• A changelog entry exists and is marked appropriately

[kibanamachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[cla-checker-service]

💚 CLA has been signed

[thompsongl]

Hi, @winnllam

Thanks for the PR!
Be sure to sign the CLA (linked in an earlier comment). This is still in draft status, do you plan on adding more commits?

[winnllam]

Hi @thompsongl,
I have signed the CLA; and I was reading the Contributing to EUI file and thought maybe I'll leave it in draft while I go through that document :)

[cchaos]

Jenkins, test this

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_3160/

[cchaos]

@winnllam Can you please fix the dependency/package file issues?

[cchaos]

The yarn.lock file changes also need to be reverted

[thompsongl]

This is great! Thanks

[thompsongl]

jenkins test this

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_3160/

[thompsongl]

jenkins test this

(flaky test)

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_3160/