Add support for ACL DRYRUN

[dogukanteber]

Resolves #1963

[codecov-commenter]

Codecov Report

Merging #1992 (fe385e5) into master (e6ccc9c) will decrease coverage by 0.03%.
The diff coverage is 37.50%.

@@            Coverage Diff             @@
##           master    #1992      +/-   ##
==========================================
- Coverage   93.07%   93.03%   -0.04%     
==========================================
  Files          77       77              
  Lines       16657    16665       +8     
==========================================
+ Hits        15504    15505       +1     
- Misses       1153     1160       +7     

Impacted Files	Coverage Δ
tests/test_commands.py	99.26% <33.33%> (-0.14%)	⬇️
redis/commands/core.py	90.41% <50.00%> (-0.06%)	⬇️
tests/test_cluster.py	98.29% <0.00%> (-0.13%)	⬇️

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[chayim]

@dogukanteber Perfect PR, all in. Great unit tests, the whole deal. @dvora-h can you add this to CHANGES and merge it. Let's get this merged into 4.2.0rc1.