Strengthen SA-10, add point defense.

Fixes https://github.com/Khopa/dcs_liberation/issues/417, though the
notes on that bug about this being non-optimal for skynet are still
true. This doesn't make skynet behavior any worse though, and does
improve it some compared to not having PD.

Adds two new SA-10 generator variants:

* Tier 2, with SA-15 for point defense
* Tier 3, with SA-15 for point defense and the Shilka upgraded to a
  Tunguska.

Updated factions that are capable of those systems, added missing SAMs
to those factions, and removed use of SA-19 as an independent SAM from
those factions. Will do a larger audit of faction SAMs later.

gen/sam/sam_group_generator.py

@@ -40,7 +40,11 @@ from gen.sam.sam_linebacker import LinebackerGenerator
 from gen.sam.sam_patriot import PatriotGenerator
 from gen.sam.sam_rapier import RapierGenerator
 from gen.sam.sam_roland import RolandGenerator
-from gen.sam.sam_sa10 import SA10Generator
+from gen.sam.sam_sa10 import (
+    SA10Generator,
+    Tier2SA10Generator,
+    Tier3SA10Generator,
+)
 from gen.sam.sam_sa11 import SA11Generator
 from gen.sam.sam_sa13 import SA13Generator
 from gen.sam.sam_sa15 import SA15Generator
@@ -79,6 +83,8 @@ SAM_MAP = {
     "SA8Generator": SA8Generator,
     "SA9Generator": SA9Generator,
     "SA10Generator": SA10Generator,
+    "Tier2SA10Generator": Tier2SA10Generator,
+    "Tier3SA10Generator": Tier3SA10Generator,
     "SA11Generator": SA11Generator,
     "SA13Generator": SA13Generator,
     "SA15Generator": SA15Generator,
@@ -95,6 +101,8 @@ SAM_MAP = {
 LONG_RANGE_SAMS = {
     "SA10Generator",
     "PatriotGenerator",
+    "Tier2SA10Generator",
+    "Tier3SA10Generator",
 }
 
 #: Used to fill the medium-range required SAM location in the campaign.