[ObjCExport] Implement initial processing queue (stable order, dependencies, forward declarations)

This commit will introduce the first processing queue
which will take care of properly ordering the 'to translate' symbols
as well as taking care of 'dependency' symbols (aka symbols
mentioned in signatures or as supertypes).

- There are several changes like properly translating
types as ObjCProtocolType instead of ObjCClassType (if origin was an interface)
- Type translation of generics defined on interfaces will also emit id type.
- Add initial nested classes collection to the queue
- Add extension function test, add tickets references

^KT-65237 Verification Pending
^KT-65329 Verification Pending

native/objcexport-header-generator/testData/dependencies/array/!array.h

@@ -0,0 +1,49 @@
+#import <Foundation/NSArray.h>
+#import <Foundation/NSDictionary.h>
+#import <Foundation/NSError.h>
+#import <Foundation/NSObject.h>
+#import <Foundation/NSSet.h>
+#import <Foundation/NSString.h>
+#import <Foundation/NSValue.h>
+
+@class Array<T>;
+
+@protocol Iterator;
+
+NS_ASSUME_NONNULL_BEGIN
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunknown-warning-option"
+#pragma clang diagnostic ignored "-Wincompatible-property-type"
+#pragma clang diagnostic ignored "-Wnullability"
+
+#pragma push_macro("_Nullable_result")
+#if !__has_feature(nullability_nullable_result)
+#undef _Nullable_result
+#define _Nullable_result _Nullable
+#endif
+
+__attribute__((objc_subclassing_restricted))
+@interface FooKt : Base
+@property (class, readonly) Array<Int *> *a __attribute__((swift_name("a")));
+@end
+
+__attribute__((objc_subclassing_restricted))
+@interface Array<T> : Base
++ (instancetype)arrayWithSize:(int32_t)size init:(T _Nullable (^)(Int *))init __attribute__((swift_name("init(size:init:)")));
++ (instancetype)alloc __attribute__((unavailable));
++ (instancetype)allocWithZone:(struct _NSZone *)zone __attribute__((unavailable));
+- (T _Nullable)getIndex:(int32_t)index __attribute__((swift_name("get(index:)")));
+- (id<Iterator>)iterator __attribute__((swift_name("iterator()")));
+- (void)setIndex:(int32_t)index value:(T _Nullable)value __attribute__((swift_name("set(index:value:)")));
+@property (readonly) int32_t size __attribute__((swift_name("size")));
+@end
+
+@protocol Iterator
+@required
+- (BOOL)hasNext __attribute__((swift_name("hasNext()")));
+- (id _Nullable)next __attribute__((swift_name("next()")));
+@end
+
+#pragma pop_macro("_Nullable_result")
+#pragma clang diagnostic pop
+NS_ASSUME_NONNULL_END

native/objcexport-header-generator/testData/dependencies/array/Foo.kt

@@ -0,0 +1 @@
+val a: Array<Int>