adt: update docstrings for IntervalTree.Insert and IntervalTree.find

[redwrasse]

Follow up to #19768, updating function docstrings for interval tree Insert and find operations (#19768 (comment)).

cc @serathius @ahrtr , let me know if this is what you had in mind.

Please read https://github.com/etcd-io/etcd/blob/main/CONTRIBUTING.md#contribution-flow.

[k8s-ci-robot]

Hi @redwrasse. 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]

Please squash the commits and signoff it. thx

[redwrasse]

Please squash the commits and signoff it. thx

Squashed and signed.

[ahrtr]

/ok-to-test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.87%. Comparing base (0167cb3) to head (c604bfd).
Report is 14 commits behind head on main.

Additional details and impacted files

Files with missing lines	Coverage Δ
pkg/adt/interval_tree.go	88.78% <ø> (ø)

... and 19 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #20015      +/-   ##
==========================================
+ Coverage   68.76%   68.87%   +0.11%     
==========================================
  Files         424      424              
  Lines       35764    35762       -2     
==========================================
+ Hits        24592    24630      +38     
+ Misses       9748     9719      -29     
+ Partials     1424     1413      -11     

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[ahrtr]

LGTM & thx

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahrtr, redwrasse, serathius

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