playground: Support component TiKV-CDC

[pingyu]

Feature Request

Is your feature request related to a problem? Please describe:

Describe the feature you'd like:

TiUP playground supports the TiKV-CDC component.

Why the featue is needed:

To make it easy for users to try the TiKV-CDC component.

Describe alternatives you've considered:

Teachability, Documentation, Adoption, Migration Strategy: