JVM_IR: fix name of received field for suspend lambdas

$ at the start caused AnonymousObjectTransformer to skip the field.

compiler/testData/codegen/box/coroutines/bridges/lambdaWithLongReceiver_ir.txt

@@ -1,8 +1,8 @@
 @kotlin.coroutines.jvm.internal.DebugMetadata
 @kotlin.Metadata
 final class LambdaWithLongReceiverKt$box$1$1 {
-    private field $p: long
     private field label: int
+    private field p$: long
     inner class LambdaWithLongReceiverKt$box$1
     inner class LambdaWithLongReceiverKt$box$1$1
     public method <init>(p0: kotlin.coroutines.Continuation): void

compiler/testData/codegen/box/coroutines/stopAfter.kt

@@ -0,0 +1,25 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// WITH_RUNTIME
+
+/**
+ * _Example_
+ * The following will print `1`, `2` and `3` when executed:
+ * ```
+ * arrayOf(1, 2, 3, 4, 5)
+ *   .iterator()
+ *   .stopAfter { it == 3 }
+ *   .forEach(::println)
+ * ```
+ * @return an iterator, which stops [this] Iterator after first element for which [predicate] returns `true`
+ */
+inline fun <T> Iterator<T>.stopAfter(crossinline predicate: (T) -> Boolean): Iterator<T> = iterator {
+  for (element in this@stopAfter) {
+    yield(element)
+    if (predicate(element)) {
+      break
+    }
+  }
+}
+
+fun box() =
+  listOf("OK", "fail").iterator().stopAfter { it == "OK" }.next()