[PL] Change semantics of CLI parameter -Xpartial-linkage

This parameter accepts the name of the "mode" in which the partial linkage would work. Currently, only two options are supported: 'enable', 'disable'. But the list may be extended in the future as needed.

At the moment the 'disable' option is the default one. This will be changed in #KT-51447, #KT-51443.

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JSCompilerArguments.kt

@@ -540,11 +540,11 @@ class K2JSCompilerArguments : CommonCompilerArguments() {
             field = if (value.isNullOrEmpty()) null else value
         }
 
-    @Argument(value = "-Xpartial-linkage", description = "Enable partial linkage mode")
-    var partialLinkage = false
+    @Argument(value = "-Xpartial-linkage", valueDescription = "{enable|disable}", description = "Use partial linkage mode")
+    var partialLinkageMode: String? = null
         set(value) {
             checkFrozen()
-            field = value
+            field = if (value.isNullOrEmpty()) null else value
         }
 
     @Argument(value = "-Xpartial-linkage-loglevel", valueDescription = "{info|warning|error}", description = "Partial linkage compile-time log level")

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2NativeCompilerArguments.kt

@@ -424,8 +424,12 @@ 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 = "Enable partial linkage mode")
-    var partialLinkage: Boolean = false
+    @Argument(value = "-Xpartial-linkage", valueDescription = "{enable|disable}", description = "Use partial linkage mode")
+    var partialLinkageMode: String? = null
+        set(value) {
+            checkFrozen()
+            field = if (value.isNullOrEmpty()) null else value
+        }
 
     @Argument(value = "-Xpartial-linkage-loglevel", valueDescription = "{info|warning|error}", description = "Partial linkage compile-time log level")
     var partialLinkageLogLevel: String? = null