JVM IR: Avoid direct invokes in callable reference tests

Due to the direct invoke optimization, most callable reference tests
were not generating callable references/lambdas.

compiler/testData/codegen/box/closures/kt4137.kt

@@ -6,7 +6,7 @@ infix fun Int.foo(s: Int): Int {
     return this + s
 }
 
-open class B : A({ 1 foo 2} ())
+open class B : A({ 1 foo 2 }.let { it() })
 
 fun box(): String {
     return if (B().s == 3) "OK" else "Fail"

compiler/testData/codegen/box/closures/localFunInInit.kt

@@ -3,7 +3,7 @@ class A {
     init {
         val flag = "OK"
         fun getFlag(): String = flag
-        result = { getFlag() } ()
+        result = { getFlag() }.let { it() }
     }
 }
 fun box(): String = A().result