K2 scripting: treat default import similarly to K1

namely, add them to importing scopes directly and according to the
schema used for other implicit imports, rather than adding them
to the regular script file imports. See KT-65982 for explanation.
#KT-65982 fixed

analysis/low-level-api-fir/testData/contextCollector/scripts/insideTopLevelFunction.copy.txt

@@ -4,14 +4,18 @@ Tower Data Context:
     Element 1
         Scope: FirExplicitStarImportingScope
     Element 2
-        Scope: FirDefaultSimpleImportingScope
+        Scope: FirExplicitStarImportingScope
     Element 3
         Scope: FirDefaultSimpleImportingScope
     Element 4
-        Scope: FirPackageMemberScope
+        Scope: FirDefaultSimpleImportingScope
     Element 5
         Scope: FirExplicitSimpleImportingScope
     Element 6
+        Scope: FirPackageMemberScope
+    Element 7
+        Scope: FirExplicitSimpleImportingScope
+    Element 8
         Scope: FirScriptDeclarationsScope
             Classifiers:
                 FirRegularClassSymbol public final? class After_OtherClass : R|kotlin/Any|
@@ -25,11 +29,11 @@ Tower Data Context:
                     public get(): R|kotlin/Int|
                 FirPropertySymbol public final val before_Val: R|kotlin/Int|
                     public get(): R|kotlin/Int|
-    Element 7
+    Element 9
         Scope: FirLocalScope
             Functions
                 FirNamedFunctionSymbol public final fun usage(foo: R|kotlin/Int|): R|kotlin/Unit|
-    Element 8
+    Element 10
         Context receivers:
             FirScriptSymbol context(<script>@R|kotlin/script/templates/standard/ScriptTemplateWithArgs|)
             SCRIPT: <script-insideTopLevelFunction.kts>
@@ -48,11 +52,11 @@ Tower Data Context:
                 public final? class After_OtherClass : R|kotlin/Any|
                 Type: kotlin.script.templates.standard.ScriptTemplateWithArgs
                 Label: <script>
-    Element 9
+    Element 11
         Scope: FirLocalScope
             Properties:
                 FirValueParameterSymbol foo: R|kotlin/Int|
-    Element 10
+    Element 12
         Scope: FirLocalScope
 
 FILE: [ResolvedTo(IMPORTS)] insideTopLevelFunction.kts