0.27 release preparations

[mythi]

Checklist:

• run validation on main
  • SGX
  • QAT
  • DSA
  • IAA
  • DLB
  • FPGA
  • GPU
• create release-0.27 branch
• make set-version TAG=0.27.0 + commit
• make lock-images + commit
• update publish.yml to create docs for v0.27
• draft release notes, review
  • announce VPU plugin deprecation
• update main README for supported versions and docs URL
• final validation
• publish release
• update main branch's operator CRs to point to 0.27
• update helm chart

[tkatila]

Release is done.