chore: adjusts ChevronIcon styling to match other icons (#12133)

### What?

Adjusts the `ChevronIcon` component to match the sizing of other icons
in the `ui` package. Also adds various styling adjustments to places
where icons are used.

### Why?

Using the `ChevronIcon` in other elements currently requires different
styling to make it consistent with other icons. This will make it so
that any usage of the any icons is consistent across components.

### How?

Resizes the `ChevronIcon` components and updates styling throughout the
admin panel.

packages/ui/src/elements/BulkUpload/ActionsBar/index.scss

@@ -33,10 +33,6 @@
         width: calc(var(--base) * 1.2);
         height: calc(var(--base) * 1.2);
 
-        svg {
-          max-width: 1rem;
-        }
-
         &:hover {
           background-color: var(--theme-elevation-200);
         }