0.26.2 release preparations

[tkatila]

Checklist:

• cherry-pick fixes to release-0.26 branch
  • qat: report cy/dc capabilities for 401xx/402xx too #1434
  • operator: fix setting QAT provisioning config volumeMount #1431
  • operator: increase memory resources to 100/120Mi #1429
  • Upgrade k8s version to latest 1.26
• run validation on release-0.26 branch
  • SGX
  • QAT
  • DSA
  • IAA
  • DLB
  • FPGA
  • GPU
• make set-version TAG=0.26.2 + commit
• make lock-images + commit
• draft release notes, review
• update main README for supported versions and docs URL
• final validation
• publish release