Bug 30699: Fix various HTML validity errors in staff interface templates

Bug 30699: Fix various HTML validity errors in staff interface templates

This patch fixes several HTML validity issues in various staff
interface templates. Most of these changes won't be visible in the
interface.

- Advanced search:
  - Remove stray </a> tags
  - Fix duplicate IDs by adding loop.index to repeated dropdown menus
- Circulation
  - Fix mismatched label and form field id in checkouts table footer
  - Fix mismatched label and form field id claim returned modal
  - Remove invalid href attribute from button in claim returned modal
  - Wrap relatives' checkouts tab in conditional so that panel doesn't
    appear when tab has been hidden
  - Fix duplicate id attributes in patron messages-related markup
  - Remove redundant class attribute from patron messages-related markup
- Acquisitions -> Vendor -> Basket -> Add to basket -> From staged file
  - Remove invalid "size" attribute from hidden form fields
- Circulation -> Holds awaiting pickup
  - Fix mismatched label and form field id
- Patron -> Accounting -> Pay fine -> Submit cash amount higher than the
  charge
  - Remove invalid href attribute from button in confirmation modal
- Fix errors in tab markup WRAPPERs in html_helpers.inc to prevent
  mismatched aria-labelledby attributes
- Footer language selector:
  - Fix markup to correct errors in aria-controls
- Remove invalid href attribute from cookie consent modal

Sponsored-by: Athens County Public Libraries
Signed-off-by: Phil Ringnalda <phil@chetcolibrary.org>
Signed-off-by: Aleisha Amohia <aleishaamohia@hotmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>