Bug 7372: Move road types from the roadtype table to the ROADTYPE AV

Bug 7372: Move road types from the roadtype table to the ROADTYPE AV

Currently road types are stored in a specific table in DB. Moreover, an
admin page is present in order to manage them.
This patch proposes to remove this table and this page in favour of a
new authorised value category 'ROADTYPE'.

This patch:
- adds a new AV category 'ROADTYPE' (created from the roadtype table
  content).
- remove the roadtype table.
- remove the .pl and .tt file admin/roadtype
- remove the 2 routines C4::Members::GetRoadTypes and
  C4::Members::GetRoadTypeDetails

Test plan:
1/ Execute the updatedatabase entry and verify existing roadtypes are
now stored in the AV 'ROADTYPE'.
2/ Verify you can add/update a streettype for patrons.
3/ Verify on following pages the streettype is displayed in patron
information (top left):
  circ/circulation.pl
  members/memberentry.pl
  members/moremember.pl
  members/routing-lists.pl

Signed-off-by: Sophie Meynieux <sophie.meynieux@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>