Node template folders restructuring (#4811)

* Restructure node-template so it is clear that node, runtime, and pallets are separated
* Separating to mock and tests
* restructuring runtime to top-level
* updated release script
* updated Cargo.lock

substrate/Cargo.lock

@@ -3554,6 +3554,7 @@ dependencies = [
  "pallet-indices",
  "pallet-randomness-collective-flip",
  "pallet-sudo",
+ "pallet-template",
  "pallet-timestamp",
  "pallet-transaction-payment",
  "parity-scale-codec",
@@ -4337,6 +4338,19 @@ dependencies = [
  "sp-std",
 ]
 
+[[package]]
+name = "pallet-template"
+version = "2.0.0"
+dependencies = [
+ "frame-support",
+ "frame-system",
+ "parity-scale-codec",
+ "safe-mix",
+ "sp-core",
+ "sp-io",
+ "sp-runtime",
+]
+
 [[package]]
 name = "pallet-timestamp"
 version = "2.0.0"