Bug - DrawerPanelContent - `hidden` takes up space and breaks cypress

[logonoff]

Describe the problem
A clear and concise description of the problem. Which components are affected?

I encountered an issue with my PR openshift/console#15077 where despite the hidden attributeof DrawerPanelContent` hiding the content, it still takes up space in the drawer main wrapper.

This causes cypress to try and scroll the drawer__main element, breaking e2e testing:

How do you reproduce the problem?
Provide steps to reproduce. A codesandbox demonstrating the problem is appreciated.

https://www.patternfly.org/components/drawer/#resizable-on-inline

Expected behavior
A clear and concise description of the expected behavior.

DrawerPanelContent takes up no height so that cypress can't scroll on it

Is this issue blocking you?
List the workaround if there is one.

In OCP we added display: none when the drawer content is hidden, but that breaks the animation

Screenshots
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What is your environment?

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

What is your product and what release date are you targeting?

Any other information?

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[rebeccaalpert]

Moving this into a sprint so it shows up on the board/is visible to the team.