Fixes #35294 - Switch to masonry card layout for Details tab

[jeremylenz]

Our implementation of the Details tab didn't look like the original mockups because we used Patternfly's Grid layout, which means cards must be a uniform height across columns.

This PR changes to a vertical flex layout for Details tab cards, which brings several advantages:

• cards don't have to be uniform heights
• smaller cards take up less vertical space
• the height of a card is independent from the height of the cards in adjacent columns

The flex layout has a maximum height and wraps cards to the next column as needed. With this change, cards will fill in from top to bottom first, then left to right.

[theforeman-bot]

Issues: #35294

[jeremylenz]

Requires https://github.com/Katello/katello/pull/10216

[jeremylenz]

Leaving in draft until I can demo it for @MariSvirik :)

[jeremylenz]

@MariSvirik Updated the max-height to calc(100vh - 225px) which accounts for the title bar and tabs etc.