Add changelog for 2022.4.0

[consideRatio]

I've tracked some pre-release work in #543, but at this point, we are ready for a proper 2022.4.0 release!

Closes #331. Note that I've added myst_parser as a dependency to allow this file to be written in markdown and integrate with the sphinx based website. It renders like this:

About recent self-merge sprint

Please note that I sprinted a bit to get to this point towards the end by self-merging CI related PRs listed below. I hope you found that acceptable. Given that we are short on maintainers to review and there were a lot of sequentials PRs that I perceived had to be made I worried that if I didn't went for this I'd run out of steam to get this release out before I had to shift my focus towards other open source projects and work tasks.

• ci: fix intermittent errors by sleeping a bit before running tests #530
• Drop support for Python 3.7 #531
• Reference distributed's actual TimeoutError used #534
• ci: fix pbs image and tests, reduce threads and delay pip install to avoid memory peak causing process termination #536
• ci, maint: build/publish to PyPI, build linux/mac and amd64/arm64 wheels #538
• Fix failure to start api/controller pods with tini as an entrypoint #540
• Disable arm64 for dask/dask-gateway image #545
• maint, docs: add myst-parser for occational markdown files and sphinx_copybutton #548
• Add RELEASE.md #549
• Update dev-environment.yaml and remove test_helm.py #550
• ci: add helm chart upgrade test #551
• ci: refactor three job definitions into one run three times #552
• Update traefik's CRDs #554
• ci: align with PEP600 about wheel platform names #555
• docs: revert adding copybutton, doesn't work well with dask theme #556

[martindurant]

Hurray!

[martindurant]

Nothing of note found.

A quick sanity check should be done that the change rst->md didn't break anything.

[consideRatio]

A quick sanity check should be done that the change rst->md didn't break anything.

Everything seems functioning as before, you can inspect the docs by checking out the branch and doing pip install docs/requirements.txt; cd docs; make devenv. If you have troubles with pip install requirements export DASK_GATEWAY_SERVER__NO_PROXY=true first to avoid compiling a golang binary.

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Btw thank you @martindurant for your review efforts!!!! ❤️ 🎉 🌻

[consideRatio]

I've now made an end to end test of the 2022.4.0-beta.1 release made in a k8s cluster, and everything works! I'll go for a merge and release of this to start working on what we need to get done next in conda-forge.

[consideRatio]

I've cut a release by bumping some versions according to RELEASE.md in a commit, and pushed a tag.

The result is that the following workflows triggered and succeed:

• https://github.com/dask/dask-gateway/runs/6116641695
• https://github.com/dask/dask-gateway/runs/6116626886

And we now have PyPI artifacts, a Helm chart and two images published:

• https://pypi.org/project/dask-gateway/2022.4.0/#files
• https://pypi.org/project/dask-gateway-server/2022.4.0/#files
• https://helm.dask.org
  
• https://github.com/dask/dask-gateway/pkgs/container/dask-gateway
• https://github.com/dask/dask-gateway/pkgs/container/dask-gateway-server

[choldgraf]

This is amazing y'all 🙂