[NET-546] Move ee code to ee package, unify ee status and terminology (#2538)

* Move ee code to ee package and unify ee status to IsPro

* Consolidate naming for paid/professional/enterprise version as "pro". Notes:

- Changes image tags
- Changes build tags
- Changes package names
- Doesn't change links to docs that mention "ee"
- Doesn't change parameters sent to PostHog that mention "ee"

* Revert docker image tag being -pro, back to -ee

* Revert go build tag being pro, back to ee

* Add build tags for some ee content

* [2] Revert go build tag being pro, back to ee

* Fix test workflow

* Add a json tag to be backwards compatible with frontend "IsEE" check

* Add a json tag for the serverconfig struct for IsEE

* Ammend json tag to Is_EE

* fix ee tags

---------

Co-authored-by: Abhishek Kondur <abhi281342@gmail.com>

logic/hosts.go

@@ -382,7 +382,7 @@ func DissasociateNodeFromHost(n *models.Node, h *models.Host) error {
 		h.Nodes = RemoveStringSlice(h.Nodes, index)
 	}
 	go func() {
-		if servercfg.Is_EE {
+		if servercfg.IsPro {
 			if clients, err := GetNetworkExtClients(n.Network); err != nil {
 				for i := range clients {
 					AllowClientNodeAccess(&clients[i], n.ID.String())