addon fluxcd support fluxcd notification-controller

[xjxtree]

I want use notification-controller to notify kustomization, helmrelease, imageaotuupdate 's event

in my case:

use kubevela application to deploy kustomization service , which kustomize yamls in git repo
and add imageupdate policy to auto update kustomize service when new image tag push to image repo
normally, kustomize service will be updated to new image auto
but in this flow, vela's application don't change, so workflow won't re-run, even I define the notify step in workflow, it dosen't work

I try deploy notification-controller myself, after I define provider, alert, without error in controller, but it can't work well(can't send event notify message)

so, I want fluxcd addon to support notification-controller, tks.

[xjxtree]

@lixd kubevela/kubevela#6362 seems has no relation to this issue

[lixd]

oh,sorry, there is a typo,kubevela/kubevela#6362 are relation to #730 and #732