fix: remove namespace in PD MS example (#6043)

[ti-chi-bot]

This is an automated cherry-pick of #6043

What problem does this PR solve?

fix #6042

What is changed and how does it work?

Code changes

• Has Go code change
• Has CI related scripts change

Tests

• Unit test
• E2E test
• Manual test
• No code

Side effects

• Breaking backward compatibility
• Other side effects:

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release Notes

Please refer to Release Notes Language Style Guide before writing the release note.

[ti-chi-bot]

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.97%. Comparing base (c23a794) to head (8c9546e).
Report is 19 commits behind head on release-1.6.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-1.6    #6044      +/-   ##
===============================================
- Coverage        57.20%   56.97%   -0.24%     
===============================================
  Files              259      260       +1     
  Lines            33233    45033   +11800     
===============================================
+ Hits             19010    25656    +6646     
- Misses           12290    17390    +5100     
- Partials          1933     1987      +54     

Flag	Coverage Δ
unittest	56.97% <ø> (-0.24%)	⬇️