Add support for EXPIRETIME

[dvora-h]

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)?
• Is there an example added to the examples folder (if applicable)?

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Description of change

closes #1806

[codecov-commenter]

Codecov Report

Merging #1860 (ff4dd1a) into master (c4e4088) will decrease coverage by 0.00%.
The diff coverage is 62.50%.

@@            Coverage Diff             @@
##           master    #1860      +/-   ##
==========================================
- Coverage   92.21%   92.20%   -0.01%     
==========================================
  Files         100      100              
  Lines       20978    20991      +13     
==========================================
+ Hits        19344    19354      +10     
- Misses       1634     1637       +3     

Impacted Files	Coverage Δ
tests/test_commands.py	99.10% <40.00%> (-0.18%)	⬇️
redis/commands/core.py	85.90% <100.00%> (-0.09%)	⬇️
tests/test_cluster.py	98.42% <0.00%> (+0.12%)	⬆️
redis/asyncio/connection.py	82.88% <0.00%> (+0.23%)	⬆️

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