update ci/workflows for snap error (#285)

## Issue
CI has an occasional issue with snap-install, which is fixed in new
data-platform workflows

## Solution
Update workflows + deps

.github/workflows/ci.yaml

@@ -68,7 +68,7 @@ jobs:
 
   build:
     name: Build charms
-    uses: canonical/data-platform-workflows/.github/workflows/build_charms_with_cache.yaml@v2
+    uses: canonical/data-platform-workflows/.github/workflows/build_charms_with_cache.yaml@v5.1.2
 
   integration-test:
     strategy:
@@ -104,7 +104,7 @@ jobs:
         uses: actions/download-artifact@v3
         with:
           name: ${{ needs.build.outputs.artifact-name }}
-      
+
       - name: Free up disk space
         run: |
           # From https://github.com/actions/runner-images/issues/2840#issuecomment-790492173

tests/integration/conftest.py

@@ -6,11 +6,9 @@
 import os
 from pathlib import Path
 
-import pytest
 from pytest_operator.plugin import OpsTest
 
 
-@pytest.fixture(scope="module")
 def ops_test(ops_test: OpsTest) -> OpsTest:
     if os.environ.get("CI") == "true":
         # Running in GitHub Actions; skip build step

tox.ini

@@ -72,11 +72,11 @@ description = Run charm integration tests
 pass_env =
     {[testenv]pass_env}
     CI
-    CI_PACKED_CHARMS
 deps =
     pytest
     juju==3.2.0.1
     pytest-operator
+    git+https://github.com/canonical/[email protected]\#subdirectory=python/pytest_plugins/pytest_operator_cache
     pytest-mock
     -r {tox_root}/requirements.txt
 commands =
@@ -87,11 +87,11 @@ description = Run high availability integration tests
 pass_env =
     {[testenv]pass_env}
     CI
-    CI_PACKED_CHARMS
 deps =
     pytest
     juju==3.2.0.1
     pytest-mock
+    git+https://github.com/canonical/[email protected]\#subdirectory=python/pytest_plugins/pytest_operator_cache
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =
@@ -102,11 +102,11 @@ description = Run new relation integration tests
 pass_env =
     {[testenv]pass_env}
     CI
-    CI_PACKED_CHARMS
 deps =
     pytest
     juju==3.2.0.1
     pytest-mock
+    git+https://github.com/canonical/[email protected]\#subdirectory=python/pytest_plugins/pytest_operator_cache
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =
@@ -117,11 +117,11 @@ description = Run legacy relation integration tests
 pass_env =
     {[testenv]pass_env}
     CI
-    CI_PACKED_CHARMS
 deps =
     pytest
     juju==3.2.0.1
     pytest-mock
+    git+https://github.com/canonical/[email protected]\#subdirectory=python/pytest_plugins/pytest_operator_cache
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =
@@ -132,11 +132,11 @@ description = Run tls integration tests
 pass_env =
     {[testenv]pass_env}
     CI
-    CI_PACKED_CHARMS
 deps =
     pytest
     juju==3.2.0.1
     pytest-mock
+    git+https://github.com/canonical/[email protected]\#subdirectory=python/pytest_plugins/pytest_operator_cache
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =
@@ -148,7 +148,6 @@ description = Run backup integration tests
 pass_env =
     {[testenv]pass_env}
     CI
-    CI_PACKED_CHARMS
     AWS_ACCESS_KEY
     AWS_SECRET_KEY
     GCP_ACCESS_KEY
@@ -157,6 +156,7 @@ deps =
     pytest
     juju==3.2.0.1
     pytest-mock
+    git+https://github.com/canonical/[email protected]\#subdirectory=python/pytest_plugins/pytest_operator_cache
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =
@@ -167,11 +167,11 @@ description = Run metrics integration tests
 pass_env =
     {[testenv]pass_env}
     CI
-    CI_PACKED_CHARMS
 deps =
     pytest
     juju==3.2.0.1
     pytest-mock
+    git+https://github.com/canonical/[email protected]\#subdirectory=python/pytest_plugins/pytest_operator_cache
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =
@@ -183,11 +183,11 @@ description = Run all integration tests
 pass_env =
     {[testenv]pass_env}
     CI
-    CI_PACKED_CHARMS
 deps =
     pytest
     juju==3.2.0.1
     pytest-mock
+    git+https://github.com/canonical/[email protected]\#subdirectory=python/pytest_plugins/pytest_operator_cache
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =