[IMP] web: graph: add bar/line chart sorting

PURPOSE

Currently, reporting views such as the bar and line charts have
their x-axis sorted either alphabetically  or according to a
sequence. When reporting, the user would be interested in sorting
the x-axis values by their measure.

SPECIFICATIONS

Add 'ascending' and 'descending' options in graph view for bar and
line charts

Task 2070103

closes odoo/odoo#49970

Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
Co-authored-by: Mohammed Shekha <msh@odoo.com>