move relay config and management config path to types

this helps avoid circular import cycle through all the code

management/server/types/config.go

@@ -0,0 +1,13 @@
+package types
+
+import "github.com/netbirdio/netbird/util"
+
+// MgmtConfigPath Config path of the Management service
+var MgmtConfigPath string
+
+// Relay configuration type
+type Relay struct {
+	Addresses      []string
+	CredentialsTTL util.Duration
+	Secret         string
+}