Bug 35621: Map ÿ to y for searching (Non-ICU)

Bug 35621: Map ÿ to y for searching (Non-ICU)

To test:
1 - Find or add a record with title: Chevilly-Larue, L'Haÿ-les-Roses, Fresnes, Rungis [par] Sté éditions et de publicité L.F.B.
2 - Search for 'L'Hay-les-Roses'
3 - No results
4 - Apply patch, copy the file:
    sudo cp /kohadevbox/koha/etc/zebradb/etc/word-phrase-utf.chr /etc/koha/zebradb/etc/word-phrase-utf.chr
5 - Restart all, Reindex
    restart_all
    sudo koha-rebuild-zebra -v -f kohadev
6 - Search again
7 - Success!

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit 1412f6c65b011ef79f955f75c812e3f7f1a9fce0)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>