JVM_IR: use indy SAM conversions in jvmTarget 1.8+, fix bridges

KT-44278 KT-26060 KT-42621

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

@@ -0,0 +1,14 @@
+// TARGET_BACKEND: JVM
+// JVM_TARGET: 1.8
+// SAM_CONVERSIONS: INDY
+
+fun interface GenericToAny<T> {
+    fun invoke(x: T): Any
+}
+
+fun interface GenericStringToAny : GenericToAny<String>
+
+fun withK(fn: GenericStringToAny) = fn.invoke("K").toString()
+
+fun box(): String =
+    withK { "O" + it }