Use licenses to populate the Entitlements API (#3715)

* Use licenses for entitlements API

Signed-off-by: Spike Curtis <spike@coder.com>

* Tests for entitlements API

Signed-off-by: Spike Curtis <spike@coder.com>

* Add commentary about FeatureService

Signed-off-by: Spike Curtis <spike@coder.com>

* Lint

Signed-off-by: Spike Curtis <spike@coder.com>

* Quiet down the logs

Signed-off-by: Spike Curtis <spike@coder.com>

* Tell revive it's ok

Signed-off-by: Spike Curtis <spike@coder.com>

Signed-off-by: Spike Curtis <spike@coder.com>

coderd/database/queries/users.sql

@@ -28,6 +28,14 @@ SELECT
 FROM
 	users;
 
+-- name: GetActiveUserCount :one
+SELECT
+	COUNT(*)
+FROM
+	users
+WHERE
+    status = 'active'::public.user_status;
+
 -- name: InsertUser :one
 INSERT INTO
 	users (