JVM: enable indy lambdas in some tests explicitly

To simplify enabling of indy lambdas by default.

compiler/testData/codegen/box/invokedynamic/sam/specializedGenerics/genericWithInProjection.kt

@@ -1,6 +1,7 @@
 // TARGET_BACKEND: JVM
 // JVM_TARGET: 1.8
 // SAM_CONVERSIONS: INDY
+// LAMBDAS: CLASS
 
 // CHECK_BYTECODE_TEXT
 // JVM_IR_TEMPLATES

compiler/testData/codegen/box/invokedynamic/sam/specializedGenerics/genericWithInProjectionWithIndyLambdas.kt

@@ -0,0 +1,27 @@
+// TARGET_BACKEND: JVM
+// JVM_TARGET: 1.8
+// SAM_CONVERSIONS: INDY
+// LAMBDAS: INDY
+
+// CHECK_BYTECODE_TEXT
+// JVM_IR_TEMPLATES
+// 1 java/lang/invoke/LambdaMetafactory
+
+// ^ Since indy for SAM types with contravariant projections is disabled (see genericWithInProjection.kt), the bytecode in this test is
+//   suboptimal. The lambda is generated via invokedynamic LambdaMetafactory and then wrapped into an instance of Cmp.
+//   The optimal way would be to generate the Cmp instance via invokedynamic LambdaMetafactory directly.
+
+fun interface Cmp<T> {
+    fun compare(a: T, b: T): Int
+}
+
+fun <T> foo(comparator: Cmp<in T>, a: T, b: T) = comparator.compare(a, b)
+
+fun bar(x: Int, y: Int) = foo({ a, b -> a - b}, x, y)
+
+fun box(): String {
+    val t = bar(42, 117)
+    if (t != -75)
+        return "Failed: t=$t"
+    return "OK"
+}