LP2043899 Revised org select field labels

LP2043899 Revised org select field labels

Reverses course on the new label strategy introduced in bug 1999158,
which proved incompatible with some components with user-configurable
labels (e.g. patron edit). Rather than introducing a <label> tag by
default, we now use the more familiar ARIA label strategy in places
where the field does not have a visible label. We will need to revisit
these, as all form fields should have visible labels per WCAG, but the
ARIA label serves to resolve the immediate problem for screen reader
users.

Affects all uses of <eg-org-select> and <eg-org-family-select>.

Signed-off-by: Stephanie Leary <stephanie.leary@equinoxoli.org>
Signed-off-by: Terran McCanna <tmccanna@georgialibraries.org>