show port of tidb when scale-out on playground

[nexustar]

What problem does this PR solve?

Don't know which port to access the new node when scale-out tidb of playground, close #1319

What is changed and how it works?

add output like To connect new added TiDB: mysql --host 127.0.0.1 --port 40405 -u root -p (no password) --comments

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

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

Release notes:

NONE

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• AstroProfundis

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[codecov-commenter]

Codecov Report

Merging #1520 (2721922) into master (c66dc09) will decrease coverage by 10.21%.
The diff coverage is n/a.

❗ Current head 2721922 differs from pull request most recent head ed9ed4a. Consider uploading reports for the commit ed9ed4a to get more accurate results

@@             Coverage Diff             @@
##           master    #1520       +/-   ##
===========================================
- Coverage   26.25%   16.04%   -10.22%     
===========================================
  Files         267      150      -117     
  Lines       24052    15033     -9019     
===========================================
- Hits         6316     2412     -3904     
+ Misses      16913    12099     -4814     
+ Partials      823      522      -301     

Flag	Coverage Δ
integrate	16.04% <ø> (ø)
tiup	16.04% <ø> (ø)
unittest	?

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

Impacted Files	Coverage Δ
embed/embed.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/utils/regexp.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/cluster/spec/validate.go	0.00% <0.00%> (-91.42%)	⬇️
pkg/utils/diff.go	0.00% <0.00%> (-83.15%)	⬇️
pkg/utils/semver.go	4.72% <0.00%> (-81.89%)	⬇️
pkg/cluster/spec/parse_topology.go	0.00% <0.00%> (-81.09%)	⬇️
pkg/cluster/executor/checkpoint.go	0.00% <0.00%> (-80.00%)	⬇️
pkg/meta/err.go	0.00% <0.00%> (-77.78%)	⬇️
pkg/telemetry/node_info.go	0.00% <0.00%> (-75.76%)	⬇️
pkg/cluster/api/error.go	0.00% <0.00%> (-71.43%)	⬇️
... and 160 more

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[AstroProfundis]

/merge

[ti-chi-bot]

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

Commit hash: ed9ed4a