Support for json multipath ($)

[chayim]

Pull Request check-list

• 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

Adding support for JSON.NUMPOWBY command

[codecov-commenter]

Codecov Report

Merging #1663 (70466b2) into master (75c5d59) will increase coverage by 0.26%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1663      +/-   ##
==========================================
+ Coverage   89.49%   89.75%   +0.26%     
==========================================
  Files          58       57       -1     
  Lines       10771    11072     +301     
==========================================
+ Hits         9639     9938     +299     
- Misses       1132     1134       +2     

Impacted Files	Coverage Δ
redis/commands/helpers.py	70.00% <100.00%> (-7.78%)	⬇️
redis/commands/json/__init__.py	100.00% <100.00%> (ø)
redis/commands/json/commands.py	95.55% <100.00%> (ø)
redis/commands/json/decoders.py	100.00% <100.00%> (ø)
tests/conftest.py	96.35% <100.00%> (ø)
tests/test_json.py	100.00% <100.00%> (ø)
redis/commands/timeseries/info.py	91.42% <0.00%> (-2.86%)	⬇️
tests/test_search.py	98.61% <0.00%> (+0.30%)	⬆️

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