[DPE-1771] Minor version upgrades (#147)

* Upgrades WIP

* Lib bump

* Update scaffolds

* Bump libs

* Tweaks

* Bump libs

* Add lightkube

* Trust in integration tests

* Add pydantic

* Revert dataintefaces and bump deps

* Check unit health

* Split check in a separate method

* Unit tests

* Integration test

* Fixes

* Mark ldap tests as unstable

* Missed import

* Linting

* Bump libs

.github/workflows/ci.yaml

@@ -77,6 +77,7 @@ jobs:
           - tls-integration
           - standalone-integration
           - legacy-client-relation-integration
+          - upgrade-integration
         agent-versions: 
           - "2.9.45"  # renovate: latest juju 2
           - "3.1.6"  # renovate: latest juju 3

actions.yaml

@@ -7,3 +7,9 @@ set-tls-private-key:
     private-key:
       type: string
       description: The content of private key for communications with clients. Content will be auto-generated if this option is not specified.
+
+pre-upgrade-check:
+  description: Run necessary pre-upgrade checks before executing a charm upgrade.
+
+resume-upgrade:
+  description: Resume a rolling upgrade after asserting successful upgrade of a new revision.