SHUTDOWN - add support for the new NOW, FORCE and ABORT modifiers

[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)?
• Was the change added to CHANGES file?

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

Description of change

closes #2126

[codecov-commenter]

Codecov Report

Merging #2150 (1484a48) into master (fa7b3f6) will decrease coverage by 0.38%.
The diff coverage is 89.47%.

@@            Coverage Diff             @@
##           master    #2150      +/-   ##
==========================================
- Coverage   92.27%   91.89%   -0.39%     
==========================================
  Files         105      108       +3     
  Lines       25246    27414    +2168     
==========================================
+ Hits        23297    25191    +1894     
- Misses       1949     2223     +274     

Impacted Files	Coverage Δ
redis/commands/core.py	82.41% <77.77%> (-1.34%)	⬇️
tests/test_commands.py	89.82% <100.00%> (-2.18%)	⬇️
redis/commands/parser.py	67.77% <0.00%> (-20.63%)	⬇️
redis/typing.py	86.11% <0.00%> (-4.22%)	⬇️
redis/cluster.py	90.41% <0.00%> (-1.31%)	⬇️
redis/asyncio/connection.py	83.63% <0.00%> (-1.21%)	⬇️
tests/test_asyncio/conftest.py	93.38% <0.00%> (-1.06%)	⬇️
tests/test_cluster.py	96.67% <0.00%> (-0.82%)	⬇️
... and 17 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update fa7b3f6...1484a48. Read the comment docs.

[chayim]

I think we need tests - even if we just mock this....

[chayim]

Can we add asserts for the various options? Also, let's try the mock on the execute_command call, not the function. Then we can validate the function is called.