Humanize type mismatch diagnostic caused by type projections

#KT-10581 Fixed

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

@@ -4,6 +4,6 @@ interface Tr<T> {
 }
 
 fun test(t: Tr<*>) {
-    t.v = <!TYPE_MISMATCH!>t<!>
+    <!SETTER_PROJECTED_OUT!>t.v<!> = t
     t.v checkType { _<Tr<*>>() }
 }

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

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

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

@@ -6,5 +6,5 @@ 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)
-    <!TYPE_MISMATCH!>t.v += null!!<!>
+    <!SETTER_PROJECTED_OUT!>t.v<!> += null!!
 }