feat(modal, wizard): add full-screen size option

[kevinbuhmann]

This is a backport of 1d126fa (#1337) to 16.x.

A full-screen modal or wizard will take up all available screen space except for some padding on all four sides.

Other changes:

• adjust static css-only modal story styles to accommodate full-screen modals
• add a story option for long content inside the modal to test scrolling within the modal

CDE-1789

[github-actions]

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[github-actions]

This PR introduces visual changes: d785d2c
If these changes are intended and correct, please cherry-pick the above commit to this PR.

git checkout kevin/full-screen-modal-wizard-16.x
git fetch https://github.com/vmware-clarity/ng-clarity.git d785d2c7d86e2ee1a8ac7eca6d6b0ba230c08aa5
git cherry-pick d785d2c7d86e2ee1a8ac7eca6d6b0ba230c08aa5
git push

[github-actions]

Hi there 👋, this is an automated message. To help Clarity keep track of discussions, we automatically lock closed PRs after 14 days. Please look for another open issue or open a new issue with updated details and reference this one as necessary.