JVM_IR more compact safe call chains (almost as old BE)

compiler/testData/codegen/bytecodeText/temporaryVals/safeCallWithElvis.kt

@@ -0,0 +1,17 @@
+fun test(a: Any?) =
+    a?.toString()?.hashCode() ?: 0
+
+// 1 ALOAD
+// 0 ASTORE
+// 0 ISTORE
+// 0 ILOAD
+// 1 POP
+// 0 valueOf
+
+// JVM_IR_TEMPLATES
+// 1 DUP
+// 1 IFNULL
+
+// JVM_TEMPLATES
+// 2 DUP
+// 2 IFNULL