[release-1.35] Bump etcd to v3.6.14

[brandond]

Proposed Changes

Bump etcd version: https://github.com/etcd-io/etcd/blob/main/CHANGELOG/CHANGELOG-3.6.md

Types of Changes

version bump

Verification

check etcd version in go.mod and reported in logs during etcd startup

Testing

yes

Linked Issues

User-Facing Change

Further Comments

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 51.09%. Comparing base (f28d6b2) to head (ddbe59f).
⚠️ Report is 1 commits behind head on release-1.35.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.35   #14462      +/-   ##
================================================
+ Coverage         51.05%   51.09%   +0.03%     
================================================
  Files               197      197              
  Lines             15764    15764              
================================================
+ Hits               8049     8054       +5     
+ Misses             6419     6403      -16     
- Partials           1296     1307      +11     

Flag	Coverage Δ
e2etests	41.42% <ø> (-0.04%)	⬇️
inttests	39.09% <ø> (+0.08%)	⬆️
unittests	24.70% <ø> (+0.08%)	⬆️

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