CloudRun - Support listing jobs with a label

[loicmathieu]

Describe the solution you'd like

We would like to be able to list CloudRun job using a filter.
Something like the following code snippet (which didn't work yet as there is no setFilter() method).

var jobsClient = JobsClient.create();
var existingJob = jobsClient.listJobs(ListJobsRequest.newBuilder()
                    .setParent(String.format("projects/%s/locations/%s", projectId, region))
                    .setFilter("labels.key=value")
                    .build();

Describe alternatives you've considered
The alternative is to list all jobs and filter later.
However, this didn't scale if there were a lot of jobs.

Additional context
It is already possible via gcloud: gcloud run jobs list --filter "labels.key=value".