Revert "[NI] Disable capturing/approximation type in TypeSubstitutor with enabled NI"

This reverts commit 7c4101e21c.

 #KT-31866 Fixed
 #KT-31868 Fixed
 #EA-125401 Fixed
 #KT-25290 Open

compiler/testData/diagnostics/tests/generics/varProjection/setterNotProjectedOutAssign.kt

@@ -5,6 +5,6 @@ interface Tr<T> {
 }
 
 fun test(t: Tr<*>) {
-    <!SETTER_PROJECTED_OUT!>t.v<!> = <!NI;TYPE_MISMATCH!>t<!>
+    <!SETTER_PROJECTED_OUT!>t.v<!> = t
     t.v checkType { _<Tr<*>>() }
 }

compiler/testData/diagnostics/tests/generics/varProjection/setterProjectedOutAssign.kt

@@ -7,9 +7,8 @@ interface Tr<T> {
 }
 
 fun test(t: Tr<*>) {
-    <!NI;SETTER_PROJECTED_OUT!>t.v<!> = null!!
-    <!SETTER_PROJECTED_OUT!>t.v<!> = <!NI;TYPE_MISMATCH!>""<!>
-    <!SETTER_PROJECTED_OUT!>t.v<!> = <!NI;NULL_FOR_NONNULL_TYPE!>null<!>
-
+    t.v = null!!
+    <!SETTER_PROJECTED_OUT!>t.v<!> = ""
+    <!SETTER_PROJECTED_OUT!>t.v<!> = null
     t.v checkType { _<Any?>() }
 }

compiler/testData/diagnostics/tests/generics/varProjection/setterProjectedOutAssignFromJava.kt

@@ -1,16 +0,0 @@
-// !WITH_NEW_INFERENCE
-// Issue: KT-31594
-
-// FILE: Tr.java
-
-public class Tr<T> {
-    public T getV() { return null; }
-    public void setV(T value) {}
-}
-
-// FILE: main.kt
-
-fun test(t: Tr<*>) {
-    <!NI;SETTER_PROJECTED_OUT!>t.v<!> = null
-    <!NI;SETTER_PROJECTED_OUT!>t.v<!> = <!NI;TYPE_MISMATCH!>""<!>
-}

compiler/testData/diagnostics/tests/generics/varProjection/setterProjectedOutAssignFromJava.txt

@@ -1,12 +0,0 @@
-package
-
-public fun test(/*0*/ t: Tr<*>): kotlin.Unit
-
-public open class Tr</*0*/ T : kotlin.Any!> {
-    public constructor Tr</*0*/ T : kotlin.Any!>()
-    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-    public open fun getV(): T!
-    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
-    public open fun setV(/*0*/ value: T!): kotlin.Unit
-    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
-}

compiler/testData/diagnostics/tests/generics/varProjection/setterProjectedOutNoPlusAssign.kt

@@ -7,5 +7,5 @@ interface Tr<T> {
 fun test(t: Tr<out String>) {
     // resolved as t.v = t.v + null!!, where type of right operand is String,
     // so TYPE_MISMATCH: String is not <: of Captured(out String)
-    <!NI;TYPE_MISMATCH!><!SETTER_PROJECTED_OUT!>t.v<!> += null!!<!>
+    <!SETTER_PROJECTED_OUT!>t.v<!> += null!!
 }