Bug 35410: Use "Online resources" label in search results

Bug 35410: Use "Online resources" label in search results

Update the staff interface and OPAC XSLT files to use
"Online resources" as the label in search results, instead of
"Online access". This matches the label used in the detail page
for a record.

Test plan:
1. Search for perl in the staff interface and OPAC (or add to
   an existing record a URL to 856$u with 4 for the first
   indicator).
2. For any search result that displays the "Online access" label,
   view the detail page for the record.
3. Note that the detail page uses the label "Online resources".
4. Apply the patch and restart_all.
5. Repeat steps 1 and 2.
6. Note that the search result pages now show "Online resources" for
   the label, matching the detail page.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: David Cook <dcook@prosentient.com.au>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit 6c8ad081a610b6e6b9cdbd3fdd519a2ca4dce3a8)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>