cluster&dm/display: add an option to only show cluster version

[AstroProfundis]

What problem does this PR solve?

Add an option --version to display subcommand of cluster and dm to only print cluster version to console.

This could be helpful for scripting, an sample usage case would be getting ctl with the same version as an deployed cluster.

Check List

Tests

• Manual test (add detailed scripts or steps below)
  

Related changes

• Need to update the documentation

Release notes:

Add an option to `display` subcommand to only show cluster version.

[lucklove]

/lgtm

[ti-chi-bot]

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• lucklove

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[lucklove]

/merge

[ti-chi-bot]

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

Commit hash: 8384bcd