We have a single of instance of react-modal that is skinned to look like PatternFly 5.  When we upgrade from PatternFly 5 to 6, we also need to update the react-modal skin so that its output looks like PatternFly 6.

A visual difference between our modal implementation and PF6 modal - https://codesandbox.io/p/sandbox/winter-lake-sxv6tk

AC: Update the single instance of react-modal in the Console repo with PF6 styling.

Note: This story should be done after Console will adopt PF6.