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/comparisonTrue.kt

@@ -0,0 +1,29 @@
+// TARGET_BACKEND: JVM_IR
+
+fun foo(): Array<Boolean> {
+    return arrayOf(
+        19 < 20.0,
+        12 > 11,
+        3.0F <= 4.0,
+        4.0F >= 4,
+        0.0 / 0 != 0.0 / 0,
+        0.0 == -0.0,
+        123 == 123,
+        123L == 123L,
+        0.0F == -0.0F,
+        0.0.compareTo(-0.0) > 0,
+        (0.0 / 0.0).compareTo(1.0 / 0.0) > 0
+    )
+}
+
+// Disabled because the current backend doesn't fold them.
+// 11 INVOKESTATIC
+// 11 INVOKESTATIC java/lang/Boolean.valueOf
+// 1 ICONST_0
+// 12 ICONST_1
+// 0 IFEQ
+// 0 IFNE
+// 0 IFGE
+// 0 IFGT
+// 0 IFLE
+// 0 IFLT