Add change log 3.7

[ah8ad3]

Follow up on pull request #18356

Added changelog file for version 3.7.
Added UsageFunc to deprecations section of changelog version 3.6.

/cc @ahrtr @ivanvc

[k8s-ci-robot]

Hi @ah8ad3. Thanks for your PR.

I'm waiting for a etcd-io member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[ahrtr]

/ok-to-test

[ahrtr]

LGTM

Thanks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.87%. Comparing base (5c147c0) to head (a6b3c93).
Report is 2 commits behind head on main.

Additional details and impacted files

see 28 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #19502      +/-   ##
==========================================
+ Coverage   68.82%   68.87%   +0.05%     
==========================================
  Files         421      421              
  Lines       35901    35901              
==========================================
+ Hits        24708    24726      +18     
+ Misses       9762     9747      -15     
+ Partials     1431     1428       -3     

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[ahrtr]

/retest

[ivanvc]

LGTM. Thanks, @ah8ad3.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ah8ad3, ahrtr, ivanvc

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