Results List: clean up aria roles

When using a screenreader, it is difficult to navigate the results list. The screenreader user expects s/he can use table commands but is unable.

Requirement

• Remove unnecessary ARIA roles (See screenshot)

• Update aria-label of the root container.

• Validate with a screenreader that list navigation commands can be used.

Approach

The MCL has an incorrect aria-label that's hard-coded to say "Table" Navigating it as a list is more accurate and will conform to future adjustments to the layout of result items.

With this approach `grid*` roles can be removed.

Test method
Screenreader

Testing Steps

1. Go to Inventory app

2. Conduct a search

3. Navigate the results list using a screenreader