[DMN] playground: add dm support for playground

[siddontang]

What problem does this PR solve?

Try to support DM in playground.

Notice, this is just a trail, a simple reference for the people who really will do this work later.

What is changed and how it works?

tiup-playground nightly --dm-master 1 --dm-worker 1

create a DM mastesr and worker.

Check List

Tests

• Manual test (add detailed scripts or steps below)

Code changes

none

Side effects

none

Related changes

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

Release notes:

Add DM support for TiUP playground

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[siddontang]

@Benjamin2037 seems that for DM worker, we should support Retry when the worker starts and tries to connect the leader of the Master.

In the case of Playground, when the master starts, and the worker will also immediately start, and the worker will fail because at that time, there is no leader in DM master.

[Benjamin2037]

After discussing with the TiUP owner, we decided to use TiUP first to start the DM master and wait for all DM master starting processes to finish, and then TiUP starts the DM worker.

[ti-chi-bot]

PR needs rebase.

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