Implement constant folding in the IR backend for JVM

The newly added pass folds the set of constant functions of the
current backend, plus IrBuiltIns.

compiler/testData/codegen/bytecodeText/constants/floatingPoints.kt

@@ -0,0 +1,16 @@
+val a = 1.0 + 10
+val b = 2 + 10.0
+val c = 3.0F + 10
+val d = 4 + 10.0F
+val e = 1.0 / 0
+val f = 1 / 0.0
+val g = 0.0 / 0
+val h = 0 / 0.0
+val i = 0.0 / 0.0
+
+// 1 LDC 11.0
+// 1 LDC 12.0
+// 1 LDC 13.0
+// 1 LDC 14.0
+// 2 LDC Infinity
+// 3 LDC NaN