Rewrite coverage paths

Since tox is running tests on the installed package, the coverage paths are no
more relative to the repository root.

modules/account_payment_sepa_cfonb/tox.ini

@@ -2,13 +2,13 @@
 envlist = {py310,py311,py312,py313,py314}-{sqlite,postgresql}
 
 [testenv]
-changedir = {toxworkdir}
+changedir = {env_site_packages_dir}
 extras = test
 commands =
-    coverage run --source=trytond.modules.account_payment_sepa_cfonb --omit=*/tests/* -m xmlrunner discover -s trytond.modules.account_payment_sepa_cfonb {posargs}
+    coverage run --rcfile={toxinidir}/tox.ini --source=trytond.modules.account_payment_sepa_cfonb --omit=*/tests/* -m xmlrunner discover -s trytond.modules.account_payment_sepa_cfonb {posargs}
 commands_post =
-    coverage report
-    coverage xml
+    coverage report --rcfile={toxinidir}/tox.ini
+    coverage xml --rcfile={toxinidir}/tox.ini -o {package_root}/coverage.xml
 deps =
     coverage
     unittest-xml-reporting
@@ -19,3 +19,6 @@ setenv =
     postgresql: TRYTOND_DATABASE_URI={env:POSTGRESQL_URI:postgresql://}
     sqlite: DB_NAME={env:DB_NAME::memory:}
     postgresql: DB_NAME={env:DB_NAME:test}
+
+[coverage:run]
+relative_files = true