vineyard latest: pre-release for latest vineyard

Commits

• [3b9ae8c]: Resize of CNCF footer. (Tao He)
• [ad42ad2]: Fixes codacy errors. (v6d-io#283) (Tao He) #283
• [5be0d27]: Upgrade etcd-cpp-apiv3, and add CNCF badge in README. (Tao He)
• [3c9133a]: Enable CodeQL test on CI. (v6d-io#284) (Tao He) #284
• [457fc49]: Use sandbox logo in README. (Tao He)
• [cf1fbf5]: Add tiny logo for CNCF and sandbox. (Tao He)
• [bf019cf]: Use a customized version of tmate action to make debug easier. (v6d-io#285) (Tao He) #285
• [b549f9a]: Implements vineyard-operator to schedule jobs based on data locality. (v6d-io#223) (Tao He) #223
• hotfix for docker-push error. (Tao He)
• [01e1e50]: A helper to provide a bytes interface for r/w on Python object. (v6d-io#286) (Tao He) #286
• [6a55c3a]: Release v0.2.2. (Tao He)
• [90b9e24]: Keep the old link as it was. (Tao He)
• [5b5c955]: Refine roadmaps, and we don't requires CLA anymore, rather, we ask for DCO. (Tao He)
• [f0a350a]: Update README.rst (Jingbo Xu)
• [b5e906a]: Add CNCF logo in svg format. (Tao He)
• [f9b2f8b]: Docutils 0.17.x has problem with sphinx_rtd_theme. (Tao He)
• [8e73f6f]: Fixes etcd image tag, as "latest" doesn't exist anymore. (Tao He)
• [daa78ea]: Use vineyard's logo as favicon.ico. (Tao He)
• [2c3e3f8]: Fixes vineyardd location in Docker image. (Tao He)
• [254db77]: Fixes copy artifacts in CI script. (Tao He)
• [777aad8]: Fixes for 254db77 and 2c3e3f8. (Tao He)
• [2e2561b]: Add milestones link to the roadmap page. (Tao He)
• [578dce3]: Implements "client.AllocatedSize" API. (Tao He)