[K/N] Migrate some cinterop tests to new test infra

native/native.tests/testData/CInterop/executable/kt63048/kt63048.def

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+language = Objective-C
+headers = kt63048.h

native/native.tests/testData/CInterop/executable/kt63048/kt63048.h

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+#import "Foundation/NSString.h"
+#import "Foundation/NSObject.h"
+
+@interface WithClassProperty : NSObject
+-(instancetype) init;
+@property (class, readonly, copy) NSString * stringProperty;
+@end

native/native.tests/testData/CInterop/executable/kt63048/kt63048.kt

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+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class, kotlin.experimental.ExperimentalObjCName::class)
+
+import kt63048.*
+import kotlin.test.assertEquals
+
+@ObjCName("KotlinImplWithCompanionPropertyOverride")
+class Impl : WithClassProperty() {
+    companion object : WithClassPropertyMeta() {
+        override fun stringProperty(): String? = "42"
+    }
+}
+
+@ObjCName("KotlinImplWithoutCompanionPropertyOverride")
+class ImplWithoutOverride : WithClassProperty() {
+    companion object : WithClassPropertyMeta() {
+    }
+}
+
+fun main() {
+    assertEquals("42", Impl.stringProperty())
+    assertEquals("153", ImplWithoutOverride.stringProperty())
+}

native/native.tests/testData/CInterop/executable/kt63048/kt63048.m

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+#import "kt63048.h"
+
+@implementation WithClassProperty : NSObject
+-(instancetype) init {}
++ (NSString *) stringProperty { return @"153"; }
+@end