fix(server): send AbortSignal correctly

[ardatan]

No description provided.

[github-actions]

🚀 Snapshot Release (alpha)

The latest changes of this PR are available as alpha on npm (based on the declared changesets):

Package	Version	Info
@whatwg-node/server	0.9.21-alpha-20231211153652-4fe5577e2123b40586375a92b10449c7fcdcfcca	npm ↗︎ unpkg ↗︎

[github-actions]

✅ Benchmark Results

     ✓ no-errors
     ✓ expected-result

     checks.........................: 100.00% ✓ 298026      ✗ 0     
     data_received..................: 29 MB   979 kB/s
     data_sent......................: 12 MB   397 kB/s
     http_req_blocked...............: avg=1.33µs   min=862ns    med=1.14µs   max=664.45µs p(90)=1.81µs   p(95)=1.97µs  
     http_req_connecting............: avg=0ns      min=0s       med=0s       max=139.38µs p(90)=0s       p(95)=0s      
     http_req_duration..............: avg=141.23µs min=93.76µs  med=134.01µs max=19.3ms   p(90)=155.52µs p(95)=162.14µs
       { expected_response:true }...: avg=141.23µs min=93.76µs  med=134.01µs max=19.3ms   p(90)=155.52µs p(95)=162.14µs
     http_req_failed................: 0.00%   ✓ 0           ✗ 149013
     http_req_receiving.............: avg=23.78µs  min=11.85µs  med=22.74µs  max=614.26µs p(90)=29.27µs  p(95)=31.25µs 
     http_req_sending...............: avg=6.12µs   min=3.99µs   med=5.27µs   max=7.14ms   p(90)=7.96µs   p(95)=8.44µs  
     http_req_tls_handshaking.......: avg=0s       min=0s       med=0s       max=0s       p(90)=0s       p(95)=0s      
     http_req_waiting...............: avg=111.32µs min=66.78µs  med=103.82µs max=19.22ms  p(90)=122.58µs p(95)=128.02µs
     http_reqs......................: 149013  4966.927403/s
     iteration_duration.............: avg=197.09µs min=137.53µs med=189.03µs max=19.81ms  p(90)=213.62µs p(95)=222.35µs
     iterations.....................: 149013  4966.927403/s
     vus............................: 1       min=1         max=1   
     vus_max........................: 1       min=1         max=1