Add required attrs to inputs, add button role to fileuploader

[bryce-mcmath]

Please check if the PR fulfills these requirements:

• After these changes, the app was run and still works as expected
• Tests for these changes were added (if applicable)
• All existing unit tests were run and still pass

Please specify the type of change this PR introduces (Bug fix, feature addition, content update, chore, etc.):

Requested a11y changes (required attributes and role attribute)

Additional Notes:

[bryce-mcmath]

Will have to include these changes in the v3 branch as well

[jlangy]

Looks good, a couple of the selects don't have aria-required, just the required attribute. Is that intentional?

[bryce-mcmath]

Looks good, a couple of the selects don't have aria-required, just the required attribute. Is that intentional?

RegionSelect and CountrySelect are wrappers around the VueRegionSelect and VueCountrySelect components, so the aria-required isn't applied on the wrappers, only the components underneath