Capitalize/decapitalize only ASCII characters across project

Use {de,}capitalizeAsciiOnly and to{Lower,Upper}CaseAsciiOnly where
possible, and stdlib's functions with Locale.US everywhere else.

Otherwise, if the default system locale is Turkish, the capital latin
letter "I" is transformed in toLowerCase to "ı" (see
https://github.com/JetBrains/kotlin/blob/66bc142f92085047a1ca64f9a291f0496e33dd98/libraries/stdlib/jvm/test/text/StringJVMTest.kt#L119),
which for example breaks the codegen for `intArrayOf` in
KT-25400/KT-43405.

Similarly, lower case latin letter "i" is transformed to "İ".

 #KT-13631 Fixed
 #KT-25400 Fixed
 #KT-43405 Fixed

core/compiler.common/src/org/jetbrains/kotlin/descriptors/annotations/AnnotationUseSiteTarget.kt

@@ -16,16 +16,18 @@
 
 package org.jetbrains.kotlin.descriptors.annotations
 
+import org.jetbrains.kotlin.util.capitalizeDecapitalize.toLowerCaseAsciiOnly
+
 enum class AnnotationUseSiteTarget(renderName: String? = null) {
-    FIELD(),
-    FILE(),
-    PROPERTY(),
+    FIELD,
+    FILE,
+    PROPERTY,
     PROPERTY_GETTER("get"),
     PROPERTY_SETTER("set"),
-    RECEIVER(),
+    RECEIVER,
     CONSTRUCTOR_PARAMETER("param"),
     SETTER_PARAMETER("setparam"),
     PROPERTY_DELEGATE_FIELD("delegate");
 
-    val renderName: String = renderName ?: name.toLowerCase()
+    val renderName: String = renderName ?: name.toLowerCaseAsciiOnly()
 }

core/descriptors/src/org/jetbrains/kotlin/builtins/ReflectionTypes.kt

@@ -20,6 +20,7 @@ import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.scopes.MemberScope
 import org.jetbrains.kotlin.types.*
+import org.jetbrains.kotlin.util.capitalizeDecapitalize.capitalizeAsciiOnly
 import kotlin.reflect.KProperty
 
 class ReflectionTypes(module: ModuleDescriptor, private val notFoundClasses: NotFoundClasses) {
@@ -35,7 +36,7 @@ class ReflectionTypes(module: ModuleDescriptor, private val notFoundClasses: Not
 
     private class ClassLookup(val numberOfTypeParameters: Int) {
         operator fun getValue(types: ReflectionTypes, property: KProperty<*>): ClassDescriptor {
-            return types.find(property.name.capitalize(), numberOfTypeParameters)
+            return types.find(property.name.capitalizeAsciiOnly(), numberOfTypeParameters)
         }
     }
 

core/descriptors/src/org/jetbrains/kotlin/renderer/DescriptorRendererImpl.kt

@@ -25,6 +25,7 @@ import org.jetbrains.kotlin.resolve.descriptorUtil.declaresOrInheritsDefaultValu
 import org.jetbrains.kotlin.types.*
 import org.jetbrains.kotlin.types.ErrorUtils.UninferredParameterTypeConstructor
 import org.jetbrains.kotlin.types.TypeUtils.CANT_INFER_FUNCTION_PARAM_TYPE
+import org.jetbrains.kotlin.util.capitalizeDecapitalize.toLowerCaseAsciiOnly
 import java.util.*
 
 internal class DescriptorRendererImpl(
@@ -494,7 +495,7 @@ internal class DescriptorRendererImpl(
 
     private fun renderModality(modality: Modality, builder: StringBuilder, defaultModality: Modality) {
         if (!renderDefaultModality && modality == defaultModality) return
-        renderModifier(builder, DescriptorRendererModifier.MODALITY in modifiers, modality.name.toLowerCase())
+        renderModifier(builder, DescriptorRendererModifier.MODALITY in modifiers, modality.name.toLowerCaseAsciiOnly())
     }
 
     private fun MemberDescriptor.implicitModalityWithoutExtensions(): Modality {
@@ -538,7 +539,7 @@ internal class DescriptorRendererImpl(
     private fun renderMemberKind(callableMember: CallableMemberDescriptor, builder: StringBuilder) {
         if (DescriptorRendererModifier.MEMBER_KIND !in modifiers) return
         if (verbose && callableMember.kind != CallableMemberDescriptor.Kind.DECLARATION) {
-            builder.append("/*").append(callableMember.kind.name.toLowerCase()).append("*/ ")
+            builder.append("/*").append(callableMember.kind.name.toLowerCaseAsciiOnly()).append("*/ ")
         }
     }