http2: fix FileHandle leak in respondWithFile

Ensure that the file handle is closed if header validation fails in
respondWithFile. This prevents ERR_INVALID_STATE errors where a
FileHandle object is closed during garbage collection.

Author: Han5991

lib/internal/http2/core.js

@@ -2680,6 +2680,8 @@ function processRespondWithFD(self, fd, headers, offset = 0, length = -1,
   try {
     headersList = buildNgHeaderString(headers, assertValidPseudoHeaderResponse);
   } catch (err) {
+    if (self.ownsFd)
+      tryClose(fd);
     self.destroy(err);
     return;
   }
@@ -2693,6 +2695,8 @@ function processRespondWithFD(self, fd, headers, offset = 0, length = -1,
   const ret = self[kHandle].respond(headersList, streamOptions);
 
   if (ret < 0) {
+    if (self.ownsFd)
+      tryClose(fd);
     self.destroy(new NghttpError(ret));
     return;
   }