fa_i() shouldn't have aria-label with role="presentation"

[gadenbuie]

fontawesome::fa_i("cloud-rain")
#> <i class="fas fa-cloud-rain" role="presentation" aria-label="cloud-rain icon"></i>

As called out in the MDN docs, aria-label shouldn't be used with role="presentation":

Note: The element with role="presentation" is not part of the accessibility tree and should not have an accessible name. Do not use aria-labelledby or aria-label.

In general, I think either the icon should be labelled or it's presentation only (or aria-hidden="true").