[K/N] only include bodies inside inlines for headers

Also renames the "header klib serializaion" option to something
that hopefully slightly better reflects its meaning
^KT-65442

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/FirNativeSerializer.kt

@@ -71,7 +71,7 @@ internal fun PhaseContext.firSerializerBase(
                         sourceBaseDirs = sourceBaseDirs,
                         languageVersionSettings = languageVersionSettings,
                         bodiesOnlyForInlines = produceHeaderKlib,
-                        skipPrivateApi = produceHeaderKlib,
+                        publicAbiOnly = produceHeaderKlib,
                         shouldCheckSignaturesOnUniqueness = shouldCheckSignaturesOnUniqueness,
                 )
             },

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/driver/phases/Serializer.kt

@@ -48,7 +48,7 @@ internal val SerializerPhase = createSimpleNamedCompilerPhase<PhaseContext, Seri
                 sourceBaseDirs = relativePathBase,
                 languageVersionSettings = config.languageVersionSettings,
                 bodiesOnlyForInlines = input.produceHeaderKlib,
-                skipPrivateApi = input.produceHeaderKlib,
+                publicAbiOnly = input.produceHeaderKlib,
         ).serializedIrModule(ir)
     }