[klib] Add an option to write out header klibs

The header klib is supposed to only contain the public abi of the module
similar to jvm-abi-gen. It is intended to be used as a dependency for other
klib compilations instead of the full klib for compilation avoidance.

^KT-60807

native/native.tests/testData/klib/header-klibs/compilation/classes/lib/classes.kt

@@ -0,0 +1,31 @@
+package lib
+
+interface I {
+    val iProperty: Int
+    fun iMethod(): Int
+}
+
+open class A : I {
+    override val iProperty: Int = 0
+    override fun iMethod(): Int = 10
+
+    val aProperty: Int = 20
+    fun aMethod(): Int = 30
+    inline fun aInlineMethod(): Int = 40
+
+    private class AB {}
+
+    companion object {
+        const val aConst: Int = 50
+    }
+}
+
+class B : A() {
+    val bProperty: Int = 60
+    fun bMethod(): Int = 70
+    inline fun bInlineMethod(): Int = 80
+
+    companion object {
+        const val bConst: Int = 90
+    }
+}