Cluster commands linkdocs

[enjoy-binbin]

Added links to the documentation in the docstrings in redis/commands/cluster.py
Part of #1712

Note stralgo is removed in 7.0, see redis/redis#9799

[chayim]

@enjoy-binbin Thank you for the documentation updates! I've taken the failing linter as an opportunity to unify our changes - we had some 'For more information check' and others as 'For more information see'. I've pushed into your PR accordingly.

[dvora-h]

@enjoy-binbin I just merge in the latest master to make sure all the tests pass and we can merge this PR.

[codecov-commenter]

Codecov Report

Merging #2069 (df853a0) into master (876cafc) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2069      +/-   ##
==========================================
- Coverage   91.23%   91.22%   -0.01%     
==========================================
  Files         100      100              
  Lines       21361    21361              
==========================================
- Hits        19489    19487       -2     
- Misses       1872     1874       +2     

Impacted Files	Coverage Δ
redis/commands/cluster.py	93.57% <ø> (ø)
redis/commands/core.py	82.92% <ø> (ø)
redis/asyncio/client.py	90.45% <0.00%> (-0.18%)	⬇️
redis/asyncio/connection.py	82.63% <0.00%> (-0.12%)	⬇️

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