[Test] Unify all fir2ir facades for non-jvm platforms

Setup of fir2ir for JS, Native and Wasm is very similar, so it makes
  sense to extract all common parts of it into common base facade

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrComponents.kt

@@ -13,6 +13,7 @@ import org.jetbrains.kotlin.ir.IrLock
 import org.jetbrains.kotlin.ir.declarations.IrFactory
 import org.jetbrains.kotlin.ir.linkage.IrProvider
 import org.jetbrains.kotlin.ir.overrides.IrFakeOverrideBuilder
+import org.jetbrains.kotlin.ir.util.KotlinMangler
 import org.jetbrains.kotlin.ir.util.SymbolTable
 
 interface Fir2IrComponents {
@@ -31,6 +32,8 @@ interface Fir2IrComponents {
     val symbolTable: SymbolTable
     val irBuiltIns: IrBuiltInsOverFir
     val builtIns: Fir2IrBuiltIns
+    val manglers: Manglers
+
     val irFactory: IrFactory
     val irProviders: List<IrProvider>
     val lock: IrLock
@@ -56,4 +59,10 @@ interface Fir2IrComponents {
     val configuration: Fir2IrConfiguration
 
     val annotationsFromPluginRegistrar: Fir2IrAnnotationsFromPluginRegistrar
+
+    interface Manglers {
+        val descriptorMangler: KotlinMangler.DescriptorMangler
+        val irMangler: KotlinMangler.IrMangler
+        val firMangler: FirMangler
+    }
 }

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrComponentsStorage.kt

@@ -68,4 +68,15 @@ class Fir2IrComponentsStorage(
 
     override val lock: IrLock
         get() = symbolTable.lock
+
+    override val manglers: Fir2IrComponents.Manglers = object : Fir2IrComponents.Manglers {
+        override val descriptorMangler: KotlinMangler.DescriptorMangler
+            get() = symbolTable.signaturer.mangler
+
+        override val irMangler: KotlinMangler.IrMangler
+            get() = irMangler
+
+        override val firMangler: FirMangler
+            get() = commonMemberStorage.firSignatureComposer.mangler
+    }
 }