[IMP] l10n_tr: KDV 20%

Turkey has adapted its standard VAT from 18% up to 20%
This commit sets the 18% VAT taxes and its tax group to inactive and
introduces the respective 20% taxes and a 20% tax group.

closes odoo/odoo#132340

Task-id: None
Signed-off-by: Brice Bartoletti (bib) <bib@odoo.com>
Co-authored-by: Ramazan Subaşı <subasiramazan@gmail.com>