Fix invalid serverType change in proxy-with-hetzner test set

[samuelstolicny]

Problem

The test file manifests/testing-framework/test-sets/proxy-with-hetzner/7.yaml attempts to change the serverType of an existing dynamic nodepool, which violates the immutability constraint introduced for dynamic nodepools.

Error

ERR immutability check for dynamic nodepools failed error="dynamic nodepools are immutable, changing the server type for gcp-cmpt-nodes is not allowed, only 'count' and autoscaling' fields are allowed to be modified, consider creating a new nodepool"

Test Progression

File	Change
5.yaml	Adds gcp-cmpt-nodes with serverType: e2-medium, count: 1
6.yaml	Scales gcp-cmpt-nodes count: 1 → 2
7.yaml	❌ Tries to change serverType: e2-medium → e2-small (invalid)
8.yaml	Removes GCP nodepool, returns to Hetzner-only

Suggested Fixes

Choose one of:

1. Delete 7.yaml and rename 8.yaml → 7.yaml (simplest)
2. Modify 7.yaml to test a valid operation:
   • Scale count down (2 → 1)
   • Add autoscaler configuration
   • Keep identical to 6.yaml (no-op test)

Reference

• Immutability check: services/claudie-operator/pkg/controller/controller.go:358-386
• Only count and autoscaler fields can be modified on existing dynamic nodepools

[bernardhalas]

Agreed to remove step 7.yaml.