Specify git branches to avoid pip unresolvable issues

[jdye64]

Avoid dependency resolution failure in latest version of pip by explicitly specifying versions for dask and distributed

Closes: #6868

[GPUtester]

Please update the changelog in order to start CI tests.

View the gpuCI docs here.

[jakirkham]

Also would grab these

cudf/conda/recipes/dask-cudf/run_test.sh

Lines 11 to 16 in 89b802e

	# Install the latest version of dask and distributed
	logger "pip install git+https://github.com/dask/distributed.git --upgrade --no-deps"
	pip install "git+https://github.com/dask/distributed.git" --upgrade --no-deps
	logger "pip install git+https://github.com/dask/dask.git --upgrade --no-deps"
	pip install "git+https://github.com/dask/dask.git" --upgrade --no-deps

cudf/ci/benchmark/build.sh

Lines 79 to 83 in f37f9b9

	pip install "git+https://github.com/dask/distributed.git" --upgrade --no-deps
	logger "pip install git+https://github.com/dask/dask.git --upgrade --no-deps"
	pip install "git+https://github.com/dask/dask.git" --upgrade --no-deps
	logger "pip install git+https://github.com/python-streamz/streamz.git --upgrade --no-deps"
	pip install "git+https://github.com/python-streamz/streamz.git" --upgrade --no-deps

cudf/ci/gpu/build.sh

Lines 91 to 93 in 69203f1

	pip install "git+https://github.com/dask/distributed.git" --upgrade --no-deps
	pip install "git+https://github.com/dask/dask.git" --upgrade --no-deps
	pip install "git+https://github.com/python-streamz/streamz.git" --upgrade --no-deps

[jdye64]

ah yes good catch!

[jakirkham]

Looks good. Thanks!

[jakirkham]

Tried using labels. Hopefully I did that correctly 😁

[codecov]

Codecov Report

Merging #6869 (4609c01) into branch-0.17 (bd537b6) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           branch-0.17    #6869   +/-   ##
============================================
  Coverage        81.92%   81.92%           
============================================
  Files               96       96           
  Lines            16167    16167           
============================================
  Hits             13245    13245           
  Misses            2922     2922           

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