Conformance test issue -- discovery test Oci-Filters-Applied should return filtertype

[MinerYang]

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

DEBUG 
==============================================================================
~~~ REQUEST ~~~
GET  /v2/conformance/testrepo/referrers/sha256:8dd24c41f8fe8b849e403dc40848946640614f37e11e5d3f9eb76efb4cde4bb9?artifactType=application%2Fvnd.nhl.peanut.butter.bagel  HTTP/1.1
HOST   : 10.202.250.166
HEADERS:
	Authorization: Bearer eyJhbGciOiJSUzI1NiIsImtpZCI6Ik9UVzI6QTNWRTo2N09OOkRZRE86N1U0VjpTRjNJOjJCQzc6N1JFQzpWU0JQOlhFVFU6UTRQVzpHVFBIIiwidHlwIjoiSldUIn0.eyJpc3MiOiJoYXJib3ItdG9rZW4taXNzdWVyIiwic3ViIjoiYWRtaW4iLCJhdWQiOiJoYXJib3ItcmVnaXN0cnkiLCJleHAiOjE2OTM0NTU0MzgsIm5iZiI6MTY5MzQ1MzYzOCwiaWF0IjoxNjkzNDUzNjM4LCJqdGkiOiJ3OUt0Mk9LZXd1V1Z4Zmg2IiwiYWNjZXNzIjpbeyJ0eXBlIjoicmVwb3NpdG9yeSIsIm5hbWUiOiJjb25mb3JtYW5jZS90ZXN0cmVwbyIsImFjdGlvbnMiOlsicHVsbCIsInB1c2giLCJkZWxldGUiXX1dfQ.irRkBo5G1MyPohUHEi4Lpc4PHVq-AM64LS7Te29dZBJDjnNTeV9tArK-99ZderFMLvYfeNEYC-udOvpeNGnX5M3TS5ivMrevTRWUcGNm-YMKd8v_9xzuZxvefdoFYK4JNtH8mbibbXoGJrA4-MGbOVq9mb4gwrIVXMYGdIT_9Kmb7Zn1GXQZB-VuibspWDwDePxXOsManxXJUvSBVhLTMFgljkDKMxsaeRLSaP7Up9s2DIhgbRBE7wVJeYutdppFVOsN65WqYc1jb-g60bEL8vaqk45Cwf0Q_t5gpmacAepDBdrTLBNKbzPMfIEAM_8me8Ciw9NFd_zBSV120BAD0qFdsMwfWIqZlm-wxJjfRrvvo8h7m_vxJYkuU5HU1Ew-3r-_Z-3kx2e7pz4m1ctqo_tbXqy9EM8km2SUe_IalKSBPf8DWLi4PGNsqGkZ6mdUNQodfSSTJ5ngXF9IG8D4G7rIbM40Vi_CuEPrYWRE9djrIL0w-wLbUh9qHwa9VCngkML25CM3-esdQbu8Seqfi1cfoSJEJwdCOJ2w_kKC99731WGTyfn5xYpcuZAM6KWJkxihi7ZyFuDa2i1dDtA0EMqPI6QhpBWK7j8J8IlNVTDvvl8P_RFera-gTrCuCoIE_ZUPMX0xa3GUnNMI_lL_HXmLxO8JdpK1xQUuFwTZNEM
	User-Agent: distribution-spec-conformance-tests
BODY   :
***** NO CONTENT *****
------------------------------------------------------------------------------
~~~ RESPONSE ~~~
STATUS       : 200 OK
PROTO        : HTTP/1.1
RECEIVED AT  : 2023-08-31T03:47:18.604140211Z
TIME DURATION: 4.558341ms
HEADERS      :
	Connection: keep-alive
	Content-Length: 298
	Content-Security-Policy: frame-ancestors 'none'
	Content-Type: application/vnd.oci.image.index.v1+json
	Date: Thu, 31 Aug 2023 03:47:18 GMT
	Oci-Filters-Applied: artifactType
	Server: nginx
	Set-Cookie: sid=5348d04d413d982323ab2e8793ae19a1; Path=/; HttpOnly
	Strict-Transport-Security: max-age=31536000; includeSubdomains; preload
	X-Frame-Options: DENY
	X-Request-Id: 80aba5b4-0446-40b9-bf82-b04f773d886d
	X-Total-Count: 4
BODY         :
{
   "schemaVersion": 2,
   "mediaType": "application/vnd.oci.image.index.v1+json",
   "manifests": [
      {
         "mediaType": "application/vnd.oci.image.manifest.v1+json",
         "digest": "sha256:97c49115eb7015e86d1110f1c1299a66d2790f0e84503030dcbbf57b83c8364b",
         "size": 744,
         "artifactType": "application/vnd.nhl.peanut.butter.bagel"
      }
   ]
}
==============================================================================

Expected
: artifactType
to equal
: application/vnd.nhl.peanut.butter.bagel

[MinerYang]

closed by opencontainers/distribution-spec@85b910a