Rework S-300 and Naval Templates, Groups and Classes

- Unified SA-10, SA-10B, SA-12, SA-20, SA-20B, SA-23 to only one template: SA-300 Site
- Updated the unit groups for S-300
- unified russian and chinese navy templates
- added frigate class

resources/units/ships/ALBATROS.yaml

@@ -1,4 +1,4 @@
-class: Destroyer
+class: Frigate
 price: 0
 variants:
   Corvette 1124.4 Grish: null

resources/units/ships/MOLNIYA.yaml

@@ -1,4 +1,4 @@
-class: Cruiser
+class: Frigate
 price: 0
 variants:
   Corvette 1241.1 Molniya: null

resources/units/ships/MOSCOW.yaml

@@ -1,4 +1,4 @@
-class: Destroyer
+class: Cruiser
 price: 0
 variants:
   Cruiser 1164 Moskva: null

resources/units/ships/Type_054A.yaml

@@ -1,4 +1,4 @@
-class: Cruiser
+class: Frigate
 price: 0
 variants:
   Type 054A Frigate: null