virt module: use 'virt:connection:uri' in all cases
virt module: use 'virt:connection:uri' in all cases

Connecting to an ESX server requires libvirt:connection property, while
connecting to another libvirt driver requires virt.connect property.
In order to harmonize them, deprecate them all in favor of
virt:connectioni:uri (issue #47156).

The rationale behind not keeping any of them is to harmonize the
libvirt:* and virt* configuration properties in this module and move
them all into a virt tree.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt