fix: only close stream if it is open

Adds a guard to the `.close` operation similar to the one on
`.abort` that ensures we only close the stream if it is open.

The individual `.closeRead`/`.closeWrite` operations already guard
on the read/write status of the stream so there's no functional
change, we just avoid a bit more async work as those methods
return promises.

packages/utils/src/abstract-stream.ts

@@ -284,6 +284,10 @@ export abstract class AbstractStream implements Stream {
 
   // Close for both Reading and Writing
   async close (options?: AbortOptions): Promise<void> {
+    if (this.status !== 'open') {
+      return
+    }
+
     this.log.trace('closing gracefully')
 
     this.status = 'closing'