Updating Basic Auth example for all CP components

[ptyagii]

The current example for basic authN covers connect and schema registry components. However, there are some other components that also support basic authN, therefore updated the basic auth example for all the CP components.

Also, starting with CFK 2.4.1, Control Center supports connecting to the Connect and ksqlDB cluster using basic authentication:

• Release notes from CFK 2.4.1

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