Support exporting configured_hz from info server

[justinmir]

When the dynamic-hz configuration option is in-use (Redis 6+), Redis will include configured_hz in the output of info server. The hz that is currently configured can impact Redis CPU utilization.

This introduces exporting the server's current configured_hz value.

[coveralls]

Pull Request Test Coverage Report for Build 10813968541

Details

• 8 of 8 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.05%) to 84.114%

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Totals
Change from base Build 10813931276:	0.05%
Covered Lines:	2012
Relevant Lines:	2392

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💛 - Coveralls

[oliver006]

Looks good.
configured_hz - question: what unit is that in? Can we add it to the metric name? Also, should you expose hz as well or is that already there?

[justinmir]

configured_hz - question: what unit is that in? Can we add it to the metric name? Also, should you expose hz as well or is that already there?

The unit in this case is actually just hz which is the unit of frequency: 1 hz == once per second.

[justinmir]

Updated to add hz since it wasn't included

[oliver006]

PR looks good!

Can you please rebase and pull in the new changes that run the tests in Github Actions?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.25%. Comparing base (262770b) to head (635cfc2).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #944      +/-   ##
==========================================
+ Coverage   80.19%   80.25%   +0.06%     
==========================================
  Files          17       17              
  Lines        1974     1980       +6     
==========================================
+ Hits         1583     1589       +6     
  Misses        306      306              
  Partials       85       85              

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