Sort out blackBox*() methods

- get rid of blackBox(), extract tests into files
- delete single-file usages of blackBoxMultiFile()
- inline some other blackBox methods
- suppress exception in blackBoxWithJava()

compiler/testData/codegen/classes/classObjectField.kt

@@ -0,0 +1,7 @@
+class A() {
+    class object {
+        val value = 10
+    }
+}
+
+fun box() = if (A.value == 10) "OK" else "Fail ${A.value}"

compiler/testData/codegen/primitiveTypes/kt665.kt

@@ -0,0 +1,12 @@
+fun f(x: Long, zzz: Long = 1): Long
+{
+    return if (x <= 1) zzz
+    else f(x-1, x*zzz)
+}
+
+fun box() : String
+{
+    val six: Long = 6;
+    if (f(six) != 720.toLong()) return "Fail"
+    return "OK"
+}

compiler/testData/codegen/primitiveTypes/kt711.kt

@@ -0,0 +1 @@
+fun box() = if ((1 ?: 0) == 1) "OK" else "fail"

compiler/testData/codegen/primitiveTypes/kt737.kt

@@ -0,0 +1,5 @@
+fun box(): String {
+    if (3.compareTo(2) != 1) return "Fail #1"
+    if (5.toByte().compareTo(10.toLong()) >= 0) return "Fail #2"
+    return "OK"
+}