srcAndDstChecksEnabled MachineClass field is not set for K8s >= 1.22 clusters

[ialidzhikov]

How to categorize this issue?

/area quality
/kind bug
/priority 3
/platform aws

What happened:
@himanshu-kun found that #386 is actually incomplete. It sets only a value in the machineclass values but this value itself is not used in the machineclass template.

What you expected to happen:
The srcAndDstChecksEnabled field to be set to the appropriate value for K8s >= 1.22 clusters.

How to reproduce it (as minimally and precisely as possible):

1. Create a K8s 1.22 cluster

2. Make sure that the corresponding MachineClass does not have the srcAndDstChecksEnabled field set.

Environment:

• Gardener version (if relevant):
• Extension version: v1.30.0
• Kubernetes version (use kubectl version):
• Cloud provider or hardware configuration:
• Others:

[AxiomSamarth]

Thanks, @ialidzhikov. I will raise a PR with the correction.

[AxiomSamarth]

/assign @AxiomSamarth