[IMP] account: add date options for tax periods

Currently the tax report always opens the previous month by default.
Since tax periods are not always months, it makes much more sense to
open the previous "tax period" (whatever length it has) when opening the
tax report.

In order to allow that, this commit introduces a "This Tax Period" and
"Previous Tax Period" option for reports and sets the default period
for the tax report to "Previous Tax Period". The rest of the
functionality is done in the related enterprise commit.

task-3481913

closes odoo/odoo#133715

Related: odoo/enterprise#46601
Signed-off-by: Olivier Colson (oco) <oco@odoo.com>

addons/account/data/account_reports_data.xml

@@ -7,7 +7,7 @@
             <field name="name">Generic Tax report</field>
             <field name="filter_multi_company">tax_units</field>
             <field name="filter_fiscal_position" eval="1"/>
-            <field name="default_opening_date_filter">last_month</field>
+            <field name="default_opening_date_filter">last_tax_period</field>
             <field name="only_tax_exigible" eval="True"/>
             <field name="column_ids">
                 <record id="generic_tax_report_column_net" model="account.report.column">

addons/account/models/account_report.py

@@ -62,6 +62,8 @@ class AccountReport(models.Model):
             ('last_month', "Last Month"),
             ('last_quarter', "Last Quarter"),
             ('last_year', "Last Year"),
+            ('this_tax_period', "This Tax Period"),
+            ('last_tax_period', "Last Tax Period"),
         ],
         compute=lambda x: x._compute_report_option_filter('default_opening_date_filter', 'last_month'),
         readonly=False, store=True, depends=['root_report_id', 'section_main_report_ids'],