playground: add --comments option to the mysql client connection tips

[tangenta]

What problem does this PR solve?

pingcap/tidb#24176 (comment)

What is changed and how it works?

Add the --comments option to the mysql client connection tips.

Check List

Tests

• Unit test
• Integration test

Code changes

NA

Side effects

NA

Related changes

NA

Release notes:

NONE

[CLAassistant]

All committers have signed the CLA.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• AstroProfundis

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[AstroProfundis]

/merge

[ti-chi-bot]

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

Commit hash: 84ce2f7

[ti-chi-bot]

@tangenta: Your PR was out of date, I have automatically updated it for you.

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[codecov-commenter]

Codecov Report

Merging #1323 (e5bcfba) into master (3099c60) will increase coverage by 4.88%.
The diff coverage is 100.00%.

❗ Current head e5bcfba differs from pull request most recent head 1ddbd0c. Consider uploading reports for the commit 1ddbd0c to get more accurate results

@@            Coverage Diff             @@
##           master    #1323      +/-   ##
==========================================
+ Coverage   26.26%   31.14%   +4.88%     
==========================================
  Files         263      275      +12     
  Lines       19005    19429     +424     
==========================================
+ Hits         4991     6052    +1061     
+ Misses      13240    12431     -809     
- Partials      774      946     +172     

Flag	Coverage Δ
integrate	22.97% <100.00%> (+6.49%)	⬆️
playground	24.13% <100.00%> (?)
tiup	16.48% <ø> (ø)
unittest	22.78% <0.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
components/playground/playground.go	46.11% <100.00%> (+46.11%)	⬆️
components/playground/instance/ticdc.go	0.00% <0.00%> (ø)
components/playground/instance/tiflash_config.go	100.00% <0.00%> (ø)
components/playground/instance/tidb.go	81.25% <0.00%> (ø)
components/playground/instance/pump.go	0.00% <0.00%> (ø)
components/playground/instance/process.go	81.39% <0.00%> (ø)
...onents/playground/instance/tiflash_proxy_config.go	81.81% <0.00%> (ø)
components/playground/instance/tikv_config.go	100.00% <0.00%> (ø)
components/playground/instance/drainer.go	0.00% <0.00%> (ø)
components/playground/instance/instance.go	45.45% <0.00%> (ø)
... and 21 more

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