JVM_IR: create temporaries for complex SAM conversion arguments

To avoid bytecode sequences like

    new _1Kt$sam$i$java_lang_Runnable$0
    dup
    new _1Kt$f$1
    dup
    invokespecial _1Kt$f$1.<init>()V
    invokespecial _1Kt$sam$i$java_lang_Runnable$0.<init>(...)V

as the different order of `new` and `<init>` confuses the inliner.

compiler/testData/codegen/boxInline/anonymousObject/sam/anonymousObjectToSam.kt

@@ -0,0 +1,16 @@
+// IGNORE_BACKEND: JVM_IR
+// FILE: 1.kt
+package test
+
+inline fun f(crossinline g: () -> Unit) = Runnable(object : () -> Unit {
+    override fun invoke() = g()
+})
+
+// FILE: 2.kt
+import test.*
+
+fun box(): String {
+    var result = "FAIL"
+    f { result = "OK" }.run()
+    return result
+}