Update Kubernetes test versions to latest supported releases (#2194)

This updates the operator E2E tests to use the three currently
supported Kubernetes versions with their latest patch releases:

- Update from v1.31.9 to v1.32.8 (v1.31 reaches EOL on Oct 28, 2025)
- Update from v1.32.5 to v1.33.4 (latest v1.33 patch)
- Add v1.34.0 (latest Kubernetes release from Aug 2025)

This aligns with the Kubernetes project's support policy of
maintaining the most recent three minor releases (1.32, 1.33, 1.34).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

Author: JAORMX

.github/workflows/operator-ci.yml

@@ -151,9 +151,9 @@ jobs:
         # but we want to make sure renovate bumps the versions when new ones are released. Doing that with
         # just the number is a bit more difficult and i like simple things.
         version: [
-          "kindest/node:v1.31.9",
-          "kindest/node:v1.32.5",
-          "kindest/node:v1.33.1"
+          "kindest/node:v1.32.8",
+          "kindest/node:v1.33.4",
+          "kindest/node:v1.34.0"
         ]
 
     steps: