[Analysis API FIR] Use stable module name when mangling internal name

^KTIJ-25046

analysis/project-structure/src/org/jetbrains/kotlin/analysis/project/structure/KtModule.kt

@@ -92,6 +92,13 @@ public sealed interface KtModule {
 public interface KtSourceModule : KtModule {
     public val moduleName: String
 
+    /**
+     * A stable binary name of module from the *Kotlin* point of view.
+     * Having correct module name is critical for `internal`-visibility mangling. See [org.jetbrains.kotlin.asJava.mangleInternalName]
+     */
+    public val stableModuleName: String?
+        get() = null
+
     override val moduleDescription: String
         get() = "Sources of $moduleName"