Implemented LATENCY HISTOGRAM by always throwing NotImplementedError

[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 #2124

[codecov-commenter]

Codecov Report

Merging #2147 (f35d35d) into master (6ba4641) will increase coverage by 0.00%.
The diff coverage is 50.00%.

❗ Current head f35d35d differs from pull request most recent head 2db85a8. Consider uploading reports for the commit 2db85a8 to get more accurate results

@@ Coverage Diff @@ ## master #2147 +/- ## ======================================= Coverage 92.44% 92.44% ======================================= Files 104 104 Lines 24385 24391 +6 ======================================= + Hits 22542 22548 +6  Misses 1843 1843 

Impacted Files	Coverage Δ
redis/commands/core.py	83.96% <50.00%> (-0.04%)	⬇️
tests/test_commands.py	94.26% <50.00%> (-0.06%)	⬇️
redis/asyncio/connection.py	84.83% <0.00%> (+0.11%)	⬆️
tests/test_cluster.py	97.48% <0.00%> (+0.11%)	⬆️

---

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 6ba4641...2db85a8. Read the comment docs.