Apply Elevation 5 to MODAL

[nkamau]

The problem
Devs have to add elevation values to components after adding the component. We want to cut that extra step out. Instead of adding a component then adding the elevation effect after, the elevation effect will already be attached to the component.

The solution
Please use these links to apply the value to the respective component:

MODAL uses Elevation 5.

Please use the value of "pharos-elevation-level-5" in storybook: https://pharos.jstor.org/storybook/?path=/story/react_styles-design-tokens--elevation

[brentswisher]

Closed with #681