cli: make error message compatible with pd flag name when PD address unreachable (#2122)

[ti-chi-bot]

This is an automated cherry-pick of #2122

What problem does this PR solve?

Inaccurate error message for PD address #1893

What is changed and how it works?

as the title said

Check List

Related changes

• Need to cherry-pick to the release branch

Release note

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[ben1009]

/run-unit-tests

[ti-chi-bot]

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This pull request has been approved by:

• amyangfei

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[amyangfei]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 85c74d2

[ti-chi-bot]

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/run-all-tests

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[codecov-commenter]

Codecov Report

Merging #2127 (08367cf) into release-4.0 (753073a) will decrease coverage by 0.0779%.
The diff coverage is 62.2068%.

@@                 Coverage Diff                 @@
##           release-4.0      #2127        +/-   ##
===================================================
- Coverage      53.7661%   53.6882%   -0.0780%     
===================================================
  Files              153        163        +10     
  Lines            15958      17339      +1381     
===================================================
+ Hits              8580       9309       +729     
- Misses            6475       7049       +574     
- Partials           903        981        +78