feat(tile-group): add legend to TileGroup, resolves #2358 (#2359)
feat(tile-group): add legend to TileGroup, resolves #2358 (#2359)

* fix: added the legend to TileGroup, resolves #2358

* fix: set legend explicitely, resolves #2358

* fix: switched to a legend tag, resolves #2358

joshblack/carbon-components-react,carbon-design-system/carbon-components-react,carbon-design-system/carbon-components,joshblack/carbon-components-react,carbon-design-system/carbon-components,carbon-design-system/carbon-components,carbon-design-system/carbon-components-react