fix(ci): increase timeout for bootstrap sdn

[universal-itengineer]

Description

Increase the timeout for waiting for SDN workloads during e2e environment bootstrap from 300 to 600 seconds.

Why do we need it, and what problem does it solve?

SDN deployments and the agent daemonset can take longer than 300 seconds to become ready in nested e2e environments. The longer timeout reduces flaky bootstrap failures while still failing the job when SDN does not become ready.

What is the expected result?

Nested e2e bootstrap waits up to 600 seconds for SDN deployments and the agent daemonset before failing.

Checklist

• The code is covered by unit tests.
• e2e tests passed.
• Documentation updated according to the changes.
• Changes were tested in the Kubernetes cluster manually.

Changelog entries

section: ci
type: fix
summary: "The SDN readiness timeout during nested e2e bootstrap has been increased."
impact_level: low