Adding ROLE Command

[AvitalFineRedis]

Pull Request check-list

Please make sure to review and check all of these items:

• Does $ tox pass with this change (including linting)?
• Do the CI tests pass with this change (enable it first in your forked repo and wait for the github action build to finish)?
• Is the new or changed code fully tested?
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?

NOTE: these things are not required to open a PR and can be done
afterwards / while the PR is open.

Description of change

Please provide a description of the change here.

[AvitalFineRedis]

@chayim, I'm not sure if I need to test more than that...

[codecov-commenter]

Codecov Report

Merging #1610 (d1ae2eb) into master (d4a9825) will decrease coverage by 0.01%.
The diff coverage is 91.66%.

@@            Coverage Diff             @@
##           master    #1610      +/-   ##
==========================================
- Coverage   92.00%   91.99%   -0.02%     
==========================================
  Files          74       74              
  Lines       15617    15628      +11     
==========================================
+ Hits        14369    14377       +8     
- Misses       1248     1251       +3     

Impacted Files	Coverage Δ
tests/test_connection_pool.py	94.54% <ø> (ø)
redis/commands/core.py	84.74% <83.33%> (-0.02%)	⬇️
tests/test_commands.py	93.45% <100.00%> (+0.01%)	⬆️
tests/test_cluster.py	97.24% <0.00%> (-0.14%)	⬇️

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