Adding object kind to notifications

[Kube-ASY]

In some notification providers like Teams it is not always clear from which object type the notifications origin.

In Slack the originating controller is used as a username of the message, but in Teams the username is set by the webhook configuration.

Would it be possible to add the Kind of the causing object to the objName that is part of the message.
E.g. as pre-/ or postfix like
<Kind>/<name>.<namespace>
or
<name>.<namespace>.<kind> (to stay in hostname notation)

(from fluxcd/flux2#710 )

[stefanprodan]

@somtochiama please implement <Kind>/<name>.<namespace>.