Add support for non-string fields in custom .status wait condition

[yorugac]

Currently, it's possible to wait for a custom .status field so long as it's a string, e.g.:

env.wait({
    kind: "TestRun",
    name: "k6-sample",
    namespace: "fancy-testing",
    status_key: "stage",
    status_value: "finished",
  }, {
    timeout: "2m",
    interval: "1s",
  });

Here, .status.stage is a string.

Support for at least numbers might also be beneficial in some testing scenarios. For example, there are common integers in status like .status.active or status.succeeded in Kubernetes Jobs.

One possible way to define would be something like this:

env.wait({
    kind: "Job",
    name: "my-job",
    status_key: "succeeded",
    status_gt: 0, // gt = greater than
  }, {
    timeout: "2m",
    interval: "1s",
  });