[IMP] point_of_sale: cleanup unnecessary testing content

* remove `component_extension_tests`, that's a test from web and
  already tested by web, no idea why it's rerunning in POS
* remove all failfast specs, after discussion with ged, seb, and
  xdo it was considered not useful: it's mostly for the runbot but
  turns out to be pretty minor as far as positives go, and it makes
  fixing errors much harder

Part-of: odoo/odoo#77735

addons/point_of_sale/__manifest__.py

@@ -204,7 +204,6 @@
             ('include', 'web.frontend_legacy'),
         ],
         'point_of_sale.qunit_suite_tests': [
-            'web/static/tests/legacy/component_extension_tests.js',
             'point_of_sale/static/tests/unit/**/*',
         ],
         'point_of_sale.assets_backend_prod_only': [

addons/point_of_sale/tests/test_js.py

@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-import odoo.addons.web.tests.test_js
 import odoo.tests
 
 
@@ -17,6 +16,4 @@ class WebSuite(odoo.tests.HttpCase):
         self.main_pos_config.open_session_cb(check_coa=False)
 
         # point_of_sale desktop test suite
-        self.browser_js(
-            "/pos/ui/tests?mod=web&failfast", "", "", login="admin", timeout=1800
-        )
+        self.browser_js("/pos/ui/tests?mod=web", "", "", login="admin", timeout=1800)

addons/web/tests/test_js.py

@@ -12,7 +12,7 @@ class WebSuite(odoo.tests.HttpCase):
 
     def test_js(self):
         # webclient desktop test suite
-        self.browser_js('/web/tests?mod=web&failfast', "", "", login='admin', timeout=1800)
+        self.browser_js('/web/tests?mod=web', "", "", login='admin', timeout=1800)
 
     def test_check_suite(self):
         # verify no js test is using `QUnit.only` as it forbid any other test to be executed
@@ -43,4 +43,4 @@ class MobileWebSuite(odoo.tests.HttpCase):
 
     def test_mobile_js(self):
         # webclient mobile test suite
-        self.browser_js('/web/tests/mobile?mod=web&failfast', "", "", login='admin', timeout=1800)
+        self.browser_js('/web/tests/mobile?mod=web', "", "", login='admin', timeout=1800)