[FIX] l10n_ec: correct currency

The currency of Ecuador is USD, ECS is archived.
Add states of Ecuador
Signs CLA

Modificando la moneda oficial de Ecuador de sucre a dolar.
La moneda oficial del Ecuador cambió de sucre a dolar en el año 2000.

introducing Ecuadorian states

Correcting previous commit according to mart-e especifications
State codes follow the ISO 3166-2. Each code is compound by two parts separated by a hyphen "-". First part is "EC" (The ISO ecuadorian code), and the second part is the ISO state code.

Correcting res.country.state file according to mart-e especifications

Adding the states directly in the l10n_ec file

closes odoo/odoo#50518

Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>