[FIR] Fix handling of type parameters in FIR mangling

#KT-57429 Fixed

compiler/testData/ir/irText/declarations/parameters/constructor.kt

@@ -1,6 +1,3 @@
-// MUTE_SIGNATURE_COMPARISON_K2: JVM_IR
-// ^ KT-57429
-
 class Test1<T1, T2>(val x: T1, val y: T2)
 
 class Test2(x: Int, val y: String) {

compiler/testData/ir/irText/declarations/parameters/dataClassMembers.kt

@@ -1,4 +1 @@
-// MUTE_SIGNATURE_COMPARISON_K2: JVM_IR
-// ^ KT-57429
-
 data class Test<T>(val x: T, val y: String = "")

compiler/testData/ir/irText/declarations/parameters/defaultPropertyAccessors.kt

@@ -1,8 +1,5 @@
 // FIR_IDENTICAL
 
-// MUTE_SIGNATURE_COMPARISON_K2: JVM_IR
-// ^ KT-57429
-
 val test1 = 42
 
 var test2 = 42

compiler/testData/ir/irText/declarations/parameters/delegatedMembers.kt

@@ -1,5 +1,5 @@
 // MUTE_SIGNATURE_COMPARISON_K2: ANY
-// ^ KT-57754, KT-57429
+// ^ KT-57754
 
 interface IBase<T> {
     fun foo(x: Int)

compiler/testData/ir/irText/declarations/parameters/genericInnerClass.kt

@@ -1,8 +1,5 @@
 // FIR_IDENTICAL
 
-// MUTE_SIGNATURE_COMPARISON_K2: JVM_IR
-// ^ KT-57429
-
 class Outer<T1> {
     inner class Inner<T2> {
         fun foo(x1: T1, x2: T2) {}