[FIR] Throw REDECLARATION for duplicated type parameters in declarations

compiler/testData/diagnostics/tests/dataClasses/repeatedProperties.fir.kt

@@ -0,0 +1,9 @@
+data class A1(val <!REDECLARATION, REDECLARATION!>x<!>: Int, val y: String, val <!REDECLARATION, REDECLARATION!>x<!>: Int) {
+    val z = ""
+}
+
+data class A2(val <!REDECLARATION!>x<!>: Int, val y: String) {
+    val <!REDECLARATION!>x<!> = ""
+}
+
+data class A3(<!REDECLARATION!>val<!SYNTAX!><!> :Int<!>, <!REDECLARATION!>val<!SYNTAX!><!> : Int<!>)

compiler/testData/diagnostics/tests/dataClasses/repeatedProperties.kt

@@ -1,4 +1,3 @@
-// FIR_IDENTICAL
 data class A1(val <!REDECLARATION, REDECLARATION, REDECLARATION!>x<!>: Int, val y: String, val <!REDECLARATION, REDECLARATION, REDECLARATION!>x<!>: Int) {
     val z = ""
 }