[FIX] hr_attendance: format hour according to locale

The time to display the check in/check out time was hardcoded to
HH:mm:ss while other locales may use different formats.
Use the appropriate time utils to retrieve the right format that uses
the time format from the res.lang record.

Fixes odoo/odoo#50527

closes odoo/odoo#54079

X-original-commit: 47707e1b
Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>