[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/auth.go

@@ -128,7 +128,7 @@ func CreateUser(user *models.User) error {
 
 		// legacy
 		if StringSliceContains(user.Networks, currentNets[i].NetID) {
-			if !servercfg.Is_EE {
+			if !servercfg.IsPro {
 				newUser.AccessLevel = pro.NET_ADMIN
 			}
 		}