LP1999158 Form labels for eg-org-select component

LP1999158 Form labels for eg-org-select component

Adds input directives to <eg-org-select> to support <label> tags with
various options. Label tags are included alongside inputs unless
explicitly suppressed. Where a visible label would disrupt the current
layout, the "visually-hidden" CSS class may be used to hide the label
visually while leaving it available to screen readers.

All current instances of <eg-org-select> have been updated. Where labels
already existed, those with specific layout requirements have been
adjusted only to add missing "for" attributes, and the component's
automatic output is suppressed with "visually-hidden". While this
sometimes results in two <label> tags being present in the DOM, this is
valid and doesn't cause any issues.

Signed-off-by: Stephanie Leary <stephanie.leary@equinoxOLI.org>
Signed-off-by: Jane Sandberg <js7389@princeton.edu>
Signed-off-by: Garry Collum <gcollum@gmail.com>
Signed-off-by: Terran McCanna <tmccanna@georgialibraries.org>