feat: add support for spam filters v1alpha2

[mmanciop]

Add support for the new CRD version, with context: <logs|spans|datapoints|web_events> instead of contexts.

NOTE: We have been shipping questionable apiVersions, using operator.dash0.com/v1alpha1 instead of v1alpha1 the backend expects. This is something we may need to revisit, as the CRDs we get from the UI look like:

apiVersion: v1alpha2 # <-- No `operator.dash0.com/` prefix!
kind: Dash0SpamFilter
metadata:
  name: ""
  labels:
    dash0.com/id: bac4f112-f0d1-40fe-b84f-797f5d6637fc
    dash0.com/source: ui
spec:
  context: log
  filter:
    - key: k8s.cluster.name
      operator: is_one_of
      values:
        - production-eu-central-1-regional
    - key: k8s.pod.name
      operator: starts_with
      value: kube-proxy

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
14.4% Duplication on New Code

See analysis details on SonarQube Cloud