[FIR] Fix handling of type parameters in FIR mangling

#KT-57429 Fixed

compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.kt

@@ -1,6 +1,3 @@
-// MUTE_SIGNATURE_COMPARISON_K2: JVM_IR
-// ^ KT-57429
-
 data class Test1(
         val stringArray: Array<String>,
         val charArray: CharArray,

compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.kt

@@ -1,6 +1,3 @@
-// MUTE_SIGNATURE_COMPARISON_K2: JVM_IR
-// ^ KT-57429
-
 data class Test1<T>(val x: T)
 
 data class Test2<T : Number>(val x: T)

compiler/testData/ir/irText/classes/delegatingConstructorCallToTypeAliasConstructor.kt

@@ -1,6 +1,3 @@
-// MUTE_SIGNATURE_COMPARISON_K2: JVM_IR
-// ^ KT-57429
-
 open class Cell<T>(val value: T)
 
 typealias CT<T> = Cell<T>

compiler/testData/ir/irText/classes/inlineClassSyntheticMethods.kt

@@ -1,8 +1,5 @@
 // !LANGUAGE: +InlineClasses
 
-// MUTE_SIGNATURE_COMPARISON_K2: JVM_IR
-// ^ KT-57429
-
 class C<T>(val t: T) {
     override fun hashCode(): Int = t as Int
 }