Prepare 0.31.1 release

[tkatila]

Checklist:

• [x] run validation on main
  • [x] GNR (IAA, DSA)
  • [x] GNR-D (QAT)
  • [x] FPGA
  • [x] SPR (SGX, QAT, GPU, IAA, DSA)
• [x] release branch changes
  • [x] edit default_labels.docker + make dockerfiles
  • [x] make set-version TAG=0.31.0 + commit
• [x] draft release notes, review
• [x] publish release
• [x] main branch changes: PR
  • [x] update base README for supported versions and docs URL
  • [x] update main branch's operator CRs to point to 0.31.1, also reconciler.go
• [x] update helm chart
  • [x] Make sure to update CRDs and README
• [x] update operatorhub.io bundle

[hj-johannes-lee]

https://github.com/k8s-operatorhub/community-operators/pull/5196 https://operatorhub.io/operator/intel-device-plugins-operator Operatorhub.io bundle published!