[FIR] Don't approximate captured types

This fixes some type argument mismatch errors caused by a captured type
being approximated and then captured again.
Some places need to be adapted to work with captured types that
previously only worked with approximated types.

#KT-62959 Fixed

compiler/testData/diagnostics/tests/generics/approximationOfInProjection.fir.kt

@@ -5,10 +5,10 @@ class Bound<T: Number>(val value: T)
 
 fun test_1() {
     val b: Bound<in Int> = Bound(1)
-    val vl: Number = <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Number")!>b.value<!>
+    val vl: Number = <!DEBUG_INFO_EXPRESSION_TYPE("CapturedType(in kotlin.Int)")!>b.value<!>
 }
 
 fun test_2() {
     val b: Bound<*> = Bound(1)
-    val vl: Number = <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.Number")!>b.value<!>
+    val vl: Number = <!DEBUG_INFO_EXPRESSION_TYPE("CapturedType(*)")!>b.value<!>
 }