[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/comparison/topLevelPrivateMembers/base/utils.kt

@@ -0,0 +1,13 @@
+package test
+
+val publicVal = 0
+const val publicConst = 0
+fun publicFun() = 0
+
+internal val internalVal = 0
+internal const val internalConst = 0
+internal fun internalFun() = 0
+
+private val privateVal = 0
+private const val privateConst = 0
+private fun privateFun() = 0

native/native.tests/testData/klib/header-klibs/comparison/topLevelPrivateMembers/sameAbi/utils.kt

@@ -0,0 +1,9 @@
+package test
+
+val publicVal = 0
+const val publicConst = 0
+fun publicFun() = 0
+
+internal val internalVal = 0
+internal const val internalConst = 0
+internal fun internalFun() = 0