lxd/network/driver/common: Remove cluster notification and DB record removal from delete() function
lxd/network/driver/common: Remove cluster notification and DB record removal from delete() function

We need more control over when we generate notifications and remove DB records, so this is being moved into the API route handler function (networkDelete()).

This also aligns better with storage pools, where the notifications and DB record removal is also handled by API route handler function (storagePoolDelete()).

Signed-off-by: Thomas Parrott <6b778ce645fb0e3dde76d79eccad490955b1ae74@canonical.com>

stgraber/lxd,hallyn/lxd,atxwebs/lxd,stgraber/lxd,lxc/lxd,lxc/lxd,hallyn/lxd,lxc/lxd,atxwebs/lxd,stgraber/lxd,hallyn/lxd,stgraber/lxd,hallyn/lxd,stgraber/lxd,hallyn/lxd,atxwebs/lxd,lxc/lxd,lxc/lxd,atxwebs/lxd,stgraber/lxd,stgraber/lxd,hallyn/lxd,lxc/lxd,lxc/lxd