JVM_IR: skip SAM lambdas when computing enclosing method of objects

This is what Java 15+ does, and it permits accessing captured type
parameters via reflection. The alternative is to emit generic signatures
on the lambda methods, but that was disabled and I have no clue why.

^KT-52417 Fixed

compiler/testData/codegen/boxInline/enclosingInfo/kt52417.kt

@@ -0,0 +1,28 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+// WITH_STDLIB
+// FILE: 1.kt
+package test
+
+abstract class TypeToken<U>
+
+// Although V is not reified, if the object happens to be regenerated, V will be replaced with its value in signatures
+inline fun <V> typeTokenOf(crossinline forceRegeneration: () -> Unit = {}) =
+    object : TypeToken<V>() {
+        fun unused() = forceRegeneration()
+    }
+
+// FILE: 2.kt
+import test.*
+
+fun interface I {
+    fun foo(): String
+}
+
+fun <T> foo() =
+    I {
+        typeTokenOf<T>()::class.java.genericSuperclass.toString()
+    }.foo()
+
+fun box(): String =
+    foo<String>().let { if (it == "test.TypeToken<T>") "OK" else it }