Authors:
  - Dante Gama Dessavre (https://github.com/dantegd)

Approvers:
  - Jordan Jacobelli (https://github.com/Ethyling)

URL: rapidsai#3937

Authors:
  - Dante Gama Dessavre (https://github.com/dantegd)

Approvers:
  - Victor Lafargue (https://github.com/viclafargue)
  - AJ Schmidt (https://github.com/ajschmidt8)

URL: rapidsai#3936

We had originally tried to ease the review process by separating the Python and CUDA/C++ layer code for HDBSCAN (see rapidsai#3773), and for the most part we have been separating the commits, however this made it very cumbersome to keep cherry-picking commits backwards so we abandoned rapidsai#3773 and continued working on this PR.

Authors:
  - Corey J. Nolet (https://github.com/cjnolet)
  - Divye Gala (https://github.com/divyegala)

Approvers:
  - Tamas Bela Feher (https://github.com/tfeher)
  - Dante Gama Dessavre (https://github.com/dantegd)

URL: rapidsai#3821

This reverts part of 99a80c8 due to unknown failure on CTX11.2.  I'm still running the CI docker script to see if I can reproduce it, so please do not merge it right now.

Authors:
  - Jiaming Yuan (https://github.com/trivialfis)

Approvers:
  - Corey J. Nolet (https://github.com/cjnolet)

URL: rapidsai#3942

Authors:
  - Dante Gama Dessavre (https://github.com/dantegd)

Approvers:
  - Jordan Jacobelli (https://github.com/Ethyling)

URL: rapidsai#3902

Author:
  - Peter Andreas Entschev (https://github.com/pentschev)

Approvers:
  - AJ Schmidt (https://github.com/ajschmidt8)
  - Dante Gama Dessavre (https://github.com/dantegd)

URL: rapidsai/dask-cuda#642

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