[ObjCExport] K1 header generator test setup: Use native compiler/native builtIns and production namer configuration

To keep the tests closer to 'real life'/'production.'

KT-65670

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

@@ -6,7 +6,7 @@
 #import <Foundation/NSString.h>
 #import <Foundation/NSValue.h>
 
-@protocol Iterator;
+@protocol KotlinIterator;
 
 NS_ASSUME_NONNULL_BEGIN
 #pragma clang diagnostic push
@@ -22,10 +22,10 @@ NS_ASSUME_NONNULL_BEGIN
 
 __attribute__((objc_subclassing_restricted))
 @interface FooKt : Base
-@property (class, readonly) id<Iterator> a __attribute__((swift_name("a")));
+@property (class, readonly) id<KotlinIterator> a __attribute__((swift_name("a")));
 @end
 
-@protocol Iterator
+@protocol KotlinIterator
 @required
 - (BOOL)hasNext __attribute__((swift_name("hasNext()")));
 - (id _Nullable)next __attribute__((swift_name("next()")));