[FIR] Fix ambiguity of Throws and other std annotations importing

Including `SharedImmutable` and `ThreadLocal`

Simplify code, remove `DefaultImportPriority.KOTLIN_THROWS`

Introduce `FirNativeClassMapper`

analysis/low-level-api-fir/testData/contextCollector/smartCasts/beforeLoop.txt

@@ -2,22 +2,20 @@ Tower Data Context:
     Element 0
         Scope: FirDefaultStarImportingScope
     Element 1
-        Scope: FirDefaultSimpleImportingScope
-    Element 2
         Scope: FirExplicitStarImportingScope
+    Element 2
+        Scope: FirDefaultSimpleImportingScope
     Element 3
         Scope: FirDefaultSimpleImportingScope
     Element 4
-        Scope: FirDefaultSimpleImportingScope
-    Element 5
         Scope: FirPackageMemberScope
-    Element 6
+    Element 5
         Scope: FirExplicitSimpleImportingScope
-    Element 7
+    Element 6
         Scope: FirLocalScope
             Properties:
                 FirValueParameterSymbol initial: R|Node|
-    Element 8
+    Element 7
         Scope: FirLocalScope
 
 FILE: [ResolvedTo(IMPORTS)] beforeLoop.kt
@@ -35,4 +33,4 @@ FILE: [ResolvedTo(IMPORTS)] beforeLoop.kt
 
     }
     public final [ResolvedTo(CONTRACTS)] fun consume([ResolvedTo(CONTRACTS)] node: R|Node|): R|kotlin/Unit| {
-    }
+    }