[Commonizer] Refactor CIR type representation

1. Drop CirClassifierId
2. Specialized classes for each kind of types (classes, TAs, type parameters, flexible types).
3. TypeCommonizer now returns commonized type. In case of TAs this could be a completely new type
   describing expect class or a new TA with the different underlying type.

native/commonizer/testData/classifierCommonization/typeAliases/commonized/common/package_kotlinx_cinterop.kt

@@ -1,5 +1,12 @@
 // this is to avoid missing Kotlin/Native stdlib
 package kotlinx.cinterop
 
-// fake class with the default constructor and no member scope
-public abstract class CStructVar()
+// fake classes with the default constructor and no member scope
+abstract class CStructVar
+class CPointer<T>
+@Suppress("FINAL_UPPER_BOUND") class UByteVarOf<T : UByte>
+class UByte
+
+// fake typealiases
+typealias CArrayPointer<T> = CPointer<T>
+typealias UByteVar = UByteVarOf<UByte>

native/commonizer/testData/classifierCommonization/typeAliases/commonized/common/package_root.kt

@@ -42,3 +42,9 @@ typealias Y = V // TA at the RHS with the different nullability of own RHS
 
 // Supertypes:
 expect class FILE : kotlinx.cinterop.CStructVar
+
+typealias uuid_t = kotlinx.cinterop.CPointer<kotlinx.cinterop.UByteVarOf<kotlinx.cinterop.UByte>>
+//                                  ^^^ TODO: ideally, it should be CArrayPointer<UByteVar>
+typealias __darwin_uuid_t = kotlinx.cinterop.CArrayPointer<kotlinx.cinterop.UByteVar>
+
+expect val uuid: uuid_t

native/commonizer/testData/classifierCommonization/typeAliases/commonized/linux/package_kotlinx_cinterop.kt

@@ -1,5 +1,12 @@
 // this is to avoid missing Kotlin/Native stdlib
 package kotlinx.cinterop
 
-// fake class with the default constructor and no member scope
-public abstract class CStructVar()
+// fake classes with the default constructor and no member scope
+abstract class CStructVar
+class CPointer<T>
+@Suppress("FINAL_UPPER_BOUND") class UByteVarOf<T : UByte>
+class UByte
+
+// fake typealiases
+typealias CArrayPointer<T> = CPointer<T>
+typealias UByteVar = UByteVarOf<UByte>

native/commonizer/testData/classifierCommonization/typeAliases/commonized/linux/package_root.kt

@@ -20,3 +20,5 @@ typealias X = U? // different nullability of the RHS TA
 // Supertypes:
 actual typealias FILE = _IO_FILE
 final class _IO_FILE : kotlinx.cinterop.CStructVar {}
+
+actual val uuid: uuid_t get() = TODO()

native/commonizer/testData/classifierCommonization/typeAliases/commonized/macos/package_kotlinx_cinterop.kt

@@ -1,5 +1,12 @@
 // this is to avoid missing Kotlin/Native stdlib
 package kotlinx.cinterop
 
-// fake class with the default constructor and no member scope
-public abstract class CStructVar()
+// fake classes with the default constructor and no member scope
+abstract class CStructVar
+class CPointer<T>
+@Suppress("FINAL_UPPER_BOUND") class UByteVarOf<T : UByte>
+class UByte
+
+// fake typealiases
+typealias CArrayPointer<T> = CPointer<T>
+typealias UByteVar = UByteVarOf<UByte>

native/commonizer/testData/classifierCommonization/typeAliases/commonized/macos/package_root.kt

@@ -21,6 +21,8 @@ typealias X = U // different nullability of the RHS TA
 actual typealias FILE = __sFILE
 final class __sFILE : kotlinx.cinterop.CStructVar {}
 
+actual val uuid: uuid_t get() = TODO()
+
 // Type alias chain that is present in one target only:
 class AA
 typealias BB = AA

native/commonizer/testData/classifierCommonization/typeAliases/original/linux/package_kotlinx_cinterop.kt

@@ -1,5 +1,12 @@
 // this is to avoid missing Kotlin/Native stdlib
 package kotlinx.cinterop
 
-// fake class with the default constructor and no member scope
-public abstract class CStructVar()
+// fake classes with the default constructor and no member scope
+abstract class CStructVar
+class CPointer<T>
+@Suppress("FINAL_UPPER_BOUND") class UByteVarOf<T : UByte>
+class UByte
+
+// fake typealiases
+typealias CArrayPointer<T> = CPointer<T>
+typealias UByteVar = UByteVarOf<UByte>

native/commonizer/testData/classifierCommonization/typeAliases/original/linux/package_root.kt

@@ -51,3 +51,8 @@ typealias Y = V // TA at the RHS with the different nullability of own RHS
 // Supertypes:
 typealias FILE = _IO_FILE
 final class _IO_FILE : kotlinx.cinterop.CStructVar {}
+
+typealias uuid_t = __darwin_uuid_t
+typealias __darwin_uuid_t = kotlinx.cinterop.CArrayPointer<kotlinx.cinterop.UByteVar>
+
+val uuid: uuid_t get() = TODO()

native/commonizer/testData/classifierCommonization/typeAliases/original/macos/package_kotlinx_cinterop.kt

@@ -1,5 +1,12 @@
 // this is to avoid missing Kotlin/Native stdlib
 package kotlinx.cinterop
 
-// fake class with the default constructor and no member scope
-public abstract class CStructVar()
+// fake classes with the default constructor and no member scope
+abstract class CStructVar
+class CPointer<T>
+@Suppress("FINAL_UPPER_BOUND") class UByteVarOf<T : UByte>
+class UByte
+
+// fake typealiases
+typealias CArrayPointer<T> = CPointer<T>
+typealias UByteVar = UByteVarOf<UByte>

native/commonizer/testData/classifierCommonization/typeAliases/original/macos/package_root.kt

@@ -52,6 +52,11 @@ typealias Y = V // TA at the RHS with the different nullability of own RHS
 typealias FILE = __sFILE
 final class __sFILE : kotlinx.cinterop.CStructVar {}
 
+typealias uuid_t = __darwin_uuid_t
+typealias __darwin_uuid_t = kotlinx.cinterop.CArrayPointer<kotlinx.cinterop.UByteVar>
+
+val uuid: uuid_t get() = TODO()
+
 // Type alias chain that is present in one target only:
 class AA
 typealias BB = AA