fix release pipeline (#40)

## Proposal
Fixing releases after a bad merge

## Context
- Installing setuptools manually can be flaky, so remove it entirely.

## Commits

* fixed application build

* reverted ubuntu version

* Update test_pgbouncer_provider.py

* Update charmcraft.yaml

charmcraft.yaml

@@ -12,4 +12,4 @@ bases:
 
 parts:
   charm:
-    charm-binary-python-packages: [psycopg2-binary==2.9.5, setuptools]
+    charm-binary-python-packages: [psycopg2-binary==2.9.5]

tests/integration/relations/pgbouncer_provider/application-charm/charmcraft.yaml

@@ -10,7 +10,6 @@ bases:
       - name: "ubuntu"
         channel: "20.04"
 
-
 parts:
   charm:
-    charm-binary-python-packages: [psycopg2-binary==2.9.5, setuptools]
+    charm-binary-python-packages: [psycopg2-binary==2.9.3]

tests/integration/relations/pgbouncer_provider/conftest.py

@@ -6,13 +6,15 @@
 from pytest_operator.plugin import OpsTest
 
 
+@pytest.mark.abort_on_fail
 @pytest.fixture(scope="module")
 async def application_charm(ops_test: OpsTest):
     """Build the application charm."""
     test_charm_path = "./tests/integration/relations/pgbouncer_provider/application-charm"
     return await ops_test.build_charm(test_charm_path)
 
 
+@pytest.mark.abort_on_fail
 @pytest.fixture(scope="module")
 async def pgb_charm(ops_test: OpsTest):
     """Build the pgbouncer charm."""