SET should fail for config that cannot be changed in a session

[mjsax]

Is your feature request related to a problem? Please describe.
Using set command, it is possible to change config that cannot be changed dynamically, for example ksql.schema.registry.url. Issuing a corresponding set command just report success and show properties shows the new value, even if the new value is not effective.

Describe the solution you'd like
The set command should fail with a descriptive error message if the config cannot be changes, and show properties should still show the old value.

[rodesai]

related: #6869