Fix tests ('infix')

compiler/testData/diagnostics/tests/functionLiterals/kt4529.kt

@@ -1,7 +1,7 @@
 //KT-4529 Lambdas are analyzed improperly in an infix call nested inside a println
 
 class G {
-    fun foo(bar: (Int) -> Int) = bar
+    infix fun foo(bar: (Int) -> Int) = bar
 }
 
 fun main(args: Array<String>) {

compiler/testData/diagnostics/tests/functionLiterals/kt4529.txt

@@ -6,7 +6,7 @@ public fun use(/*0*/ a: kotlin.Any?): kotlin.Any?
 public final class G {
     public constructor G()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-    public final fun foo(/*0*/ bar: (kotlin.Int) -> kotlin.Int): (kotlin.Int) -> kotlin.Int
+    public final infix fun foo(/*0*/ bar: (kotlin.Int) -> kotlin.Int): (kotlin.Int) -> kotlin.Int
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }

compiler/testData/diagnostics/tests/functionLiterals/kt6541_extensionForExtensionFunction.kt

@@ -4,7 +4,7 @@ interface Foo
 fun (Foo.() -> Unit).invoke(b : Foo.() -> Unit)  {}
 
 object Z {
-    fun add(b : Foo.() -> Unit) : Z = Z
+    infix fun add(b : Foo.() -> Unit) : Z = Z
 }
 
 val t2 = Z add <!TYPE_MISMATCH!>{ } <!TOO_MANY_ARGUMENTS!>{ }<!><!>

compiler/testData/diagnostics/tests/functionLiterals/kt6541_extensionForExtensionFunction.txt

@@ -11,7 +11,7 @@ public interface Foo {
 
 public object Z {
     private constructor Z()
-    public final fun add(/*0*/ b: Foo.() -> kotlin.Unit): Z
+    public final infix fun add(/*0*/ b: Foo.() -> kotlin.Unit): Z
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String