Add VAT api post for IBFE artifacts

We need to start posting artifact and publishedTimestamp data to the internal/import/artifacts VAT endpoint. This will eventually replace the ibfe api endpoint we're currently posting to in the S3 stage, but we can continue hitting that endpoint until IBFE migrates to using VAT's endpoints for this data.

At the very end of the pipeline (before/after posting to IBFE's endpoint), we need to:

• Create a json body in the form

{
    "containerName": "redhat/ubi/ubi8",
    "containerVersion": "8.4",
    "publishedTimestamp": "2030-01-01T00:34:58.955Z",
    "readme": "abc/12345/readme",
    "license": "abc/12345/license",
    "tar": "abc/12345/ubi8.tar"
}

• Create a bearer token auth header using the CI_JOB_JWT
• POST to os.environ['VAT_BACKEND_SERVER_URL]/internal/import/artifacts