Unpin Pydantic and related packages

The Pydantic version we used before has an issue in the mypy plugin
which can lead to actual typing errors slipping through, see
pydantic/pydantic#9008.

Note that the version we udpate to has this issue:
pydantic/pydantic#9319
However, since a workaround is available, we still udpate to avoid
introducing new typing errors.

Also fix newly found issues. Apparently, polyfactory now has issues with
handling field aliases, so we switch to validation aliases, which are
sufficient in this case.

CMK-17006

Change-Id: I8b8ebb072f0c68b799d28c132c5f5605232db9c7

Pipfile

@@ -157,9 +157,9 @@ apispec = "==6.4.0"  # direct dependency
 marshmallow = "==3.21.1"  # direct dependency
 marshmallow-oneofschema = "==3.1.1"  # direct dependency
 apispec-oneofschema = "==3.0.0"  # direct dependency
-pydantic = "==2.5.2"
-pydantic_core = "==2.14.5"  # used by pydantic and by us
-annotated-types = "==0.6.0"  # provides validators for pydantic2
+pydantic = "*"
+pydantic_core = "*"  # used by pydantic and by us
+annotated-types = "*"  # provides validators for pydantic2
 paho-mqtt = "==1.6.1"  # needed for MQTT special agent
 python-active-directory = "==2.0.1"
 rrdtool = "==0.1.16"  # Actually we ship the binding which comes with rrdtool itself...