[VC-37264] Update E2E test to check for certificate in the API

[wallrj]

I adapted the commands that @maelvls described in the PR #628.

The E2E test script will now create a TLS certificate in a Secret (not managed by cert-manager) with a unique common name,
and wait for a certificate with that unique common name to appear in the Venafi Cloud API.
Signifying that the venafi-kubernetes-agent has successfully uploaded the data and that the TLSPK backend has successfully processed the data.

$ make test-e2e-gke
...
{
  "ts": 1732293943910.6917,
  "caller": "cache/reflector.go:368",
  "msg": "Caches populated for *v1alpha1.VenafiConnection from k8s.io/[email protected]/tools/cache/reflector.go:243",
  "v": 2
}
{"ts":1732293944460.7644,"caller":"agent/run.go:409","msg":"Data sent successfully","v":0,"logger":"Run.gatherAndOutputData.postData"}
.+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*....+...+...+.....+......+..........+.....+.+..+......+...................+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*..+......+.......+...+...+..+....+.....+.........+.......+.....+............+.+....................+.+........+...+.............+..+..........+.........+..................+...+........+....+..+...+.......+........+...+...+.......+.....+.........+.+............+...+..+.+...........+.............+...+.................+.+............+..+.+.....+.+...+........+....+...+...+.....+...+.........+................+..+............+..........+...+...+.....+......+...+...+...+....+.....+......+.+...+..+.+...+.....+.......+.....+.........+....+......+........+.............+..+.......+.....+...+.......+...+........+...+....+......+..+...+......+.+...+......+...+.....+..........+...+........+.+......+..+.+............+..+.......+......+.......................+......+.............+.....+......+............+...+....+..+.+..+.+...........+....+.....+....+..+.+........+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
.....................+....+...+.....+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*....+....................+.+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*...+...+...+.....+..........+.....+.......+..+....+......+...+......+......+......+..+.+..+.......+...........+......+....+.....+......+.+.....+...+......+.+........+.........+...+.......+..+...+......+.......+.....+..................+.......+..+.+......+...........+...+..........+..+.............+..+....+...+..+...+.+.....+.+......+...+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-----
secret/venafi-kubernetes-agent-e2e.fc151446-d61a-4f44-88e7-fea34cbed76e created
{"count":0,"certificates":[]}
{"count":0,"certificates":[]}
{"count":0,"certificates":[]}
{"count":0,"certificates":[]}
{
  "count": 1,
  "certificates": [
    {
      "id": "8055dc30-a8f1-11ef-a949-796f7926985d",
      "companyId": "9a0cab61-2b00-11ee-ba09-0733b0fe5adc",
      "managedCertificateId": "81508fe0-a8f1-11ef-825d-05a7a681c5d0",
      "fingerprint": "C47F482C252FFDEFFE330A3B9F98EBFA6347A61D",
      "certificateName": "venafi-kubernetes-agent-e2e.fc151446-d61a-4f44-88e7-fea34cbed76e",
      "issuerCertificateIds": [],
      "certificateStatus": "ACTIVE",
      "modificationDate": "2024-11-22T16:47:48.178+00:00",
      "validityStart": "2024-11-22T16:45:53.000+00:00",
      "validityEnd": "2025-11-22T16:45:53.000+00:00",
      "selfSigned": true,
      "signatureAlgorithm": "SHA256_WITH_RSA_ENCRYPTION",
      "signatureHashAlgorithm": "SHA256",
      "encryptionType": "RSA",
      "keyStrength": 2048,
      "subjectKeyIdentifierHash": "AC927B150927F9BEF588364B5C7468F36CACD687",
      "authorityKeyIdentifierHash": "AC927B150927F9BEF588364B5C7468F36CACD687",
      "serialNumber": "44EB333BB52D2D110490B97563D58A79E9C491B6",
      "subjectDN": "cn=venafi-kubernetes-agent-e2e.fc151446-d61a-4f44-88e7-fea34cbed76e",
      "subjectCN": [
        "venafi-kubernetes-agent-e2e.fc151446-d61a-4f44-88e7-fea34cbed76e"
      ],
      "subjectAlternativeNamesByType": {
        "otherName": [],
        "rfc822Name": [],
        "dNSName": [],
        "x400Address": [],
        "directoryName": [],
        "ediPartyName": [],
        "uniformResourceIdentifier": [],
        "iPAddress": [],
        "registeredID": []
      },
      "issuerDN": "cn=venafi-kubernetes-agent-e2e.fc151446-d61a-4f44-88e7-fea34cbed76e",
      "issuerCN": [
        "venafi-kubernetes-agent-e2e.fc151446-d61a-4f44-88e7-fea34cbed76e"
      ],
      "ocspNoCheck": false,
      "versionType": "CURRENT",
      "totalInstanceCount": 1,
      "totalActiveInstanceCount": 0,
      "instances": [],
      "ownership": {}
    }
  ]
}

$ echo $?
0

[wallrj]

I'd accidentally removed this pipefail trick in #596
and it resulted in the test always exiting with a 141 status.

I've restored it here so that the new shell lines can run after the "Data sent successfully" message.

[wallrj]

I didn't realise that you can pipe into the timeout command. This allows me to run the getCertificate repeatedly until it succeeds, or until the timeout expires.