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/inlineClasses/contextsAndAccessors/accessPrivateInlineClassMethodFromLambda2.kt

@@ -4,7 +4,7 @@
 
 OPTIONAL_JVM_INLINE_ANNOTATION
 value class R(private val r: Long) {
-    fun test() = { ok() }()
+    fun test() = { ok() }.let { it() }
 
     private fun ok() = "OK"
 }

compiler/testData/codegen/box/inlineClasses/contextsAndAccessors/accessPrivateInlineClassMethodFromLambda2Generic.kt

@@ -4,7 +4,7 @@
 
 OPTIONAL_JVM_INLINE_ANNOTATION
 value class R<T: Long>(private val r: T) {
-    fun test() = { ok() }()
+    fun test() = { ok() }.let { it() }
 
     private fun ok() = "OK"
 }

compiler/testData/codegen/box/inlineClasses/contextsAndAccessors/captureInlineClassInstanceInLambda.kt

@@ -4,7 +4,7 @@
 
 OPTIONAL_JVM_INLINE_ANNOTATION
 value class R(private val r: Int) {
-    fun test() = { ok() }()
+    fun test() = { ok() }.let { it() }
 
     fun ok() = "OK"
 }

compiler/testData/codegen/box/inlineClasses/contextsAndAccessors/captureInlineClassInstanceInLambda2.kt

@@ -4,7 +4,7 @@
 
 OPTIONAL_JVM_INLINE_ANNOTATION
 value class R(private val r: Long) {
-    fun test() = { ok() }()
+    fun test() = { ok() }.let { it() }
 
     fun ok() = "OK"
 }

compiler/testData/codegen/box/inlineClasses/contextsAndAccessors/captureInlineClassInstanceInLambda2Generic.kt

@@ -4,7 +4,7 @@
 
 OPTIONAL_JVM_INLINE_ANNOTATION
 value class R<T: Long>(private val r: T) {
-    fun test() = { ok() }()
+    fun test() = { ok() }.let { it() }
 
     fun ok() = "OK"
 }

compiler/testData/codegen/box/inlineClasses/contextsAndAccessors/captureInlineClassInstanceInLambdaGeneric.kt

@@ -4,7 +4,7 @@
 
 OPTIONAL_JVM_INLINE_ANNOTATION
 value class R<T: Int>(private val r: T) {
-    fun test() = { ok() }()
+    fun test() = { ok() }.let { it() }
 
     fun ok() = "OK"
 }