Feat/runtime/peer pods e2e

[3u13r]

With this PR you should be able to create a AKS PeerPods SNP cluster and successfully run the openssl tests:

just create AKS-PEER-SNP
just get-credentials-peerpod
just e2e openssl AKS-PEER-SNP

TODOs before merging, which should likely be done in separate PRs:

• Implement SNP/vTPM attestation to replace "wip: introduce insecure attestation"
• Implement genpolicy "hacks" that are not already covered by peer-pods: pass policy hash via userdata #941. This likely only refers to the network namespace part of the commit
• "wip: introduce insecure attestation" also adds the issuer and validator regardless if it's specified in the manifest. If not implemented in the PR that implements the SNP/vTPM attestation, implement the attestation also in the manifest.

[katexochen]

Development has been halted, closing this for now.