Migrate boxInline tests to new multi-file framework

compiler/testData/codegen/boxInline/simple/severalClosures.kt

@@ -0,0 +1,38 @@
+// FILE: 1.kt
+
+class Inline() {
+
+    inline fun foo1(closure1 : (l: Int) -> Int, param1: Int, closure2 : (l: Double) -> Double, param2: Double) : Double {
+        return closure1(param1) + closure2(param2)
+    }
+
+    inline fun foo2(closure1 : (Int, Int) -> Int, param1: Int, closure2 : (Double, Int, Int) -> Double, param2: Double, param3: Int) : Double {
+        return closure1(param1, param3) + closure2(param2, param1, param3)
+    }
+}
+
+// FILE: 2.kt
+
+fun test1(): Double {
+    val inlineX = Inline()
+    return inlineX.foo1({ z: Int -> z}, 25, { z: Double -> z}, 11.5)
+}
+
+fun test1WithCaptured(): Double {
+    val inlineX = Inline()
+    var d = 0.0;
+    return inlineX.foo1({ z: Int -> d = 1.0; z}, 25, { z: Double -> z + d}, 11.5)
+}
+
+fun test2(): Double {
+    val inlineX = Inline()
+    return inlineX.foo2({ z: Int, p: Int -> z + p}, 25, { x: Double, y: Int, z: Int -> z + x + y}, 11.5, 2)
+}
+
+fun box(): String {
+    if (test1() != 36.5) return "test1: ${test1()}"
+    if (test1WithCaptured() != 37.5) return "test1WithCaptured: ${test1WithCaptured()}"
+    if (test2() != 65.5) return "test2: ${test2()}"
+
+    return "OK"
+}