pd-ctl, config: adjust the output of pd config

[lhy1024]

What problem does this PR solve?

Issue Number: Close #8694

What is changed and how does it work?

Check List

Tests

• Unit test

Release note

None.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.97%. Comparing base (41bd2cd) to head (64595df).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8695      +/-   ##
==========================================
+ Coverage   69.94%   69.97%   +0.03%     
==========================================
  Files         517      517              
  Lines       79947    79947              
==========================================
+ Hits        55920    55946      +26     
+ Misses      20453    20433      -20     
+ Partials     3574     3568       -6     

Flag	Coverage Δ
unittests	69.97% <ø> (+0.03%)	⬆️

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-10-12 09:22:19.934010578 +0000 UTC m=+90137.082920410: ☑️ agreed by okJiang.
• 2024-10-17 06:58:21.256476103 +0000 UTC m=+513498.405385937: ☑️ agreed by JmPotato.

[lhy1024]

step1:
set election interval with 5s

step2:
patch with this pr

[ti-chi-bot]

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JmPotato, niubell, okJiang

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