Bug 33810: Opac advanced search fields need aria-labels

Bug 33810: Opac advanced search fields need aria-labels

The OPAC advanced search fields need aria-labels to assist with screen reading. This patch adds labels to both the dropdown selects and the text inputs

Signed-off-by: joubu <xxx@example.org>
Signed-off-by: Emily Lamancusa <emily.lamancusa@montgomerycountymd.gov>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 933c779b7d49525a561070dd8d60941f5f000c06)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>