[IR, Native] Add compiler flag for partial linkage mode

^KT-50775

kotlin-native/backend.native/cli.bc/src/org/jetbrains/kotlin/cli/bc/K2Native.kt

@@ -386,6 +386,7 @@ class K2Native : CLICompiler<K2NativeCompilerArguments>() {
                 putIfNotNull(RUNTIME_LOGS, arguments.runtimeLogs)
                 putIfNotNull(BUNDLE_ID, parseBundleId(arguments, outputKind, configuration))
                 put(MEANINGFUL_BRIDGE_NAMES, arguments.meaningfulBridgeNames)
+                put(PARTIAL_LINKAGE, arguments.partialLinkage)
             }
         }
     }

kotlin-native/backend.native/cli.bc/src/org/jetbrains/kotlin/cli/bc/K2NativeCompilerArguments.kt

@@ -364,6 +364,9 @@ class K2NativeCompilerArguments : CommonCompilerArguments() {
     @Argument(value = "-Xlazy-ir-for-caches", valueDescription = "{disable|enable}", description = "Use lazy IR for cached libraries")
     var lazyIrForCaches: String? = null
 
+    @Argument(value = "-Xpartial-linkage", description = "Allow unlinked symbols")
+    var partialLinkage: Boolean = false
+
     override fun configureAnalysisFlags(collector: MessageCollector, languageVersion: LanguageVersion): MutableMap<AnalysisFlag<*>, Any> =
             super.configureAnalysisFlags(collector, languageVersion).also {
                 val optInList = it[AnalysisFlags.optIn] as List<*>