Do not use KotlinTypeMapper in generateTypeOf inline intrinsic

Make ReifiedTypeInliner and related classes generic over the
KotlinTypeMarker subtype (KotlinType or IrType), add a typeSystem to get
arguments/nullability and other properties of types regardless of their
representation, but still fall back to KotlinType when generating the
actual bytecode of other intrinsics (as/is)

core/descriptors/src/org/jetbrains/kotlin/types/TypeSystemCommonBackendContext.kt

@@ -12,6 +12,9 @@ import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.types.model.*
 
 interface TypeSystemCommonBackendContext : TypeSystemContext {
+    fun nullableAnyType(): SimpleTypeMarker
+    fun arrayType(componentType: KotlinTypeMarker): SimpleTypeMarker
+
     fun TypeConstructorMarker.isFinalClassOrEnumEntryOrAnnotationClassConstructor(): Boolean
 
     fun KotlinTypeMarker.hasAnnotation(fqName: FqName): Boolean
@@ -44,6 +47,7 @@ interface TypeSystemCommonBackendContext : TypeSystemContext {
     fun TypeConstructorMarker.getClassFqNameUnsafe(): FqNameUnsafe?
 
     fun TypeParameterMarker.getName(): Name
+    fun TypeParameterMarker.isReified(): Boolean
 
     fun KotlinTypeMarker.isInterfaceOrAnnotationClass(): Boolean
 }

core/descriptors/src/org/jetbrains/kotlin/types/checker/ClassicTypeSystemContext.kt

@@ -341,7 +341,8 @@ interface ClassicTypeSystemContext : TypeSystemInferenceExtensionContext, TypeSy
         return builtIns.anyType
     }
 
-    val builtIns: KotlinBuiltIns get() = throw UnsupportedOperationException("Not supported")
+    open val builtIns: KotlinBuiltIns
+        get() = throw UnsupportedOperationException("Not supported")
 
     override fun KotlinTypeMarker.makeDefinitelyNotNullOrNotNull(): KotlinTypeMarker {
         require(this is UnwrappedType, this::errorMessage)
@@ -502,6 +503,11 @@ interface ClassicTypeSystemContext : TypeSystemInferenceExtensionContext, TypeSy
         return this is NewCapturedTypeConstructor
     }
 
+    override fun arrayType(componentType: KotlinTypeMarker): SimpleTypeMarker {
+        require(componentType is KotlinType, this::errorMessage)
+        return builtIns.getArrayType(Variance.INVARIANT, componentType)
+    }
+
     override fun KotlinTypeMarker.hasAnnotation(fqName: FqName): Boolean {
         require(this is KotlinType, this::errorMessage)
         return annotations.hasAnnotation(fqName)
@@ -557,6 +563,11 @@ interface ClassicTypeSystemContext : TypeSystemInferenceExtensionContext, TypeSy
         return name
     }
 
+    override fun TypeParameterMarker.isReified(): Boolean {
+        require(this is TypeParameterDescriptor, this::errorMessage)
+        return isReified
+    }
+
     override fun KotlinTypeMarker.isInterfaceOrAnnotationClass(): Boolean {
         require(this is KotlinType, this::errorMessage)
         val descriptor = constructor.declarationDescriptor

core/descriptors/src/org/jetbrains/kotlin/types/checker/NewKotlinTypeChecker.kt

@@ -16,6 +16,7 @@
 
 package org.jetbrains.kotlin.types.checker
 
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.TypeAliasDescriptor
 import org.jetbrains.kotlin.resolve.OverridingUtil
@@ -31,6 +32,8 @@ import org.jetbrains.kotlin.types.typeUtil.makeNullable
 
 object SimpleClassicTypeSystemContext : ClassicTypeSystemContext
 
+class ClassicTypeSystemContextImpl(override val builtIns: KotlinBuiltIns) : ClassicTypeSystemContext
+
 object StrictEqualityTypeChecker {
 
     /**