Conformance test issue -- References teardown

[MinerYang]

This issue is a sub-task of Distribution spec v1.1 phase3 epic (#19173)

~~ REQUEST ~~~
DELETE  /v2/conformance/testrepo/manifests/sha256:2f38e355f56e4bd2d10b406940be9732bd29e9f44e4b338c2bba6520fc0d3605  HTTP/1.1
HOST   : 10.1.0.115
HEADERS:
	Authorization: Bearer eyJhbGciOiJSUzI1NiIsImtpZCI6IkZVQkY6TDZURTpNTFlZOjZLWDI6NEFZWTo1RVNQOkEzN0U6U082Uzo1WUVFOkM1Qkg6VUw2Szo3R0xLIiwidHlwIjoiSldUIn0.eyJpc3MiOiJoYXJib3ItdG9rZW4taXNzdWVyIiwic3ViIjoiYWRtaW4iLCJhdWQiOiJoYXJib3ItcmVnaXN0cnkiLCJleHAiOjE2OTE5OTU3NzYsIm5iZiI6MTY5MTk5Mzk3NiwiaWF0IjoxNjkxOTkzOTc2LCJqdGkiOiI0eHlGRHhGVklLRjJ1RTRGIiwiYWNjZXNzIjpbeyJ0eXBlIjoicmVwb3NpdG9yeSIsIm5hbWUiOiJjb25mb3JtYW5jZS90ZXN0cmVwbyIsImFjdGlvbnMiOlsicHVsbCIsInB1c2giLCJkZWxldGUiXX1dfQ.qUl5mVJu0xUPUZ128SfV6TP3URSoRK8pIU9EdbhKg4DPglEA2_umx_kmv4kZR2VWEH1TCk52u73SQSqMSjBgnlwRmuGPndRmrivVap0HjXrAzYU9_gxwNty6wphQTXeladp81g4igIUI6kTFmUS7APjZsK0rIBzaSdktVLBj8qyK19q9fcRoyh8ICKXF12up5KFVueqzZaxDGTZb3ZLSoXCqfPSws8o-3tODZLgpA4HmiVjUxolnzVp4GCXY-MqykHcb6CBjnLzVeIIoqPTXUBEZnogi45G1DmI8KyN0CG7EAAM3w3fdREKdQ7-_yPV8KwWGGZkyTG9H6W9Ebih1QuJgMJHVp3AL34AiFRzEpurOtVkhWGYUm1cGjLpgas8aLSCXbAmglFtRDe51KAIxYIPl8vpKjEyFo4c_dB-LQMc0vS1MKKDElw6sxBdxHKOUbLCd8qfiLLPTKR7297jkpdL8qBkNruFQGO4D4WbzCPCJtXw_zTuj5qbrkTj2hFwl4_-3nsfPA6_dBCPDPasfN2fSA6tqEPYIwb9ZQIuESUOQTNO6yQKlQNzHxP0d_77kzsvOcfOpiWp5fHncM_VuVOA-yl_A22kWzWlF_6kG1HO48J2mvPmIkG_rdaVYRSwEpq1_yx0--h5SJH8pU9bRKJXFB7OXTYuqcQTBXSM762Q
	User-Agent: distribution-spec-conformance-tests
BODY   :
***** NO CONTENT *****
------------------------------------------------------------------------------
~~~ RESPONSE ~~~
STATUS       : 404 Not Found
PROTO        : HTTP/1.1
RECEIVED AT  : 2023-08-14T06:19:36.990241594Z
TIME DURATION: 6.300424ms
HEADERS      :
	Connection: keep-alive
	Content-Length: 158
	Content-Type: application/json; charset=utf-8
	Date: Mon, 14 Aug 2023 06:19:36 GMT
	Server: nginx
	Set-Cookie: sid=c903e6d67af03e1454e6c49ef209301d; Path=/; HttpOnly
	X-Request-Id: 3a13b801-478c-4884-a98a-e5d8454dd1c8
BODY         :
{
   "errors": [
      {
         "code": "NOT_FOUND",
         "message": "artifact conformance/testrepo@sha256:2f38e355f56e4bd2d10b406940be9732bd29e9f44e4b338c2bba6520fc0d3605 not found"
      }
   ]
}

Expected
: 404
To satisfy at least one of these matchers: [%!s(*matchers.AndMatcher=&{[0xc0003537a0 0xc0003537d0] 0xc0003537d0}) %!s(*matchers.EqualMatcher=&{405})]

[github-actions]

This issue is being marked stale due to a period of inactivity. If this issue is still relevant, please comment or remove the stale label. Otherwise, this issue will close in 30 days.

[MinerYang]

Fixed by upstream conformance test.
opencontainers/distribution-spec#479