syntax check mqtt topic names and topic filters in zilla.yaml

[vordimous]

Is your feature request related to a problem? Please describe.
When I use an invalid topic name/filter Zilla will crash with a stack trace Caused by: java.util.regex.PatternSyntaxException: Dangling meta character '*'

    - when:
        - publish:
            - topic: "*"
        - subscribe:
            - topic: "*"

Describe the solution you'd like
Add validation checks when parsing the zilla.yaml

[jfallows]

Topic filter wildcard syntax in mqtt uses + and #.

• https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html#_Toc3901241

We should definitely enforce this in zilla.yaml schema for both mqtt and mqtt-kafka bindings, to get a more reasonable error message on startup when the syntax is incorrect.