start connector node by default

[lmatz]

What's changed and what's your intention?

PLEASE DO NOT LEAVE THIS EMPTY !!!

These two yaml files are the default ones that get used by users, e.g. reading README.md in this Repo or reading documentation at risingwave.dev.

I think we can start the connector node by default as it is a must for postgres-cdc and other advanced sources/sinks.

They typically encounter transport error when they try to establish source without starting a connector node.

Try to reduce the friction and confusion.

Checklist

• I have written the necessary docs and comments
• I have added necessary unit tests and integration tests

Refer to a related PR or issue link (optional)

[codecov]

Codecov Report

Merging #484 (25649af) into main (272469d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #484   +/-   ##
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  Coverage   67.67%   67.67%           
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  Files          27       27           
  Lines        4210     4210           
=======================================
  Hits         2849     2849           
  Misses       1312     1312           
  Partials       49       49           

Flag	Coverage Δ
unittests	67.67% <ø> (ø)

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[arkbriar]

LGTM!