Bug 27299: Remove tokenization for phrase register/index with ICU

Bug 27299: Remove tokenization for phrase register/index with ICU

This patch removes tokenization for phrase register/index when
using ICU.

This should cause "exact" searches to work the same way with ICU
as they do with CHR.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 7f9c909d5a603c40125064e7e32f24e595d596e2)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 3a841a3a74a6165af996f8ca9c8affe8c5192f9e)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
(cherry picked from commit 83716bc4ac3676a151845e2e507d6aef90dd1e13)
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>