## Why are these changes needed?
- Fixes the jobs tab in the new dashboard. Previously it didn't load.
- Combines the old job concept, "driver jobs" and the new job submission conception into a single concept called "jobs". Jobs tab shows information about both jobs.
- Updates all job APIs: They now returns both submission jobs and driver jobs. They also contains additional data in the response including "id", "job_id", "submission_id", and "driver". They also accept either job_id or submission_id as input.
- Job ID is the same as the "ray core job id" concept. It is in the form of "0100000" and is the primary id to represent jobs.
- Submission ID is an ID that is generated for each ray job submission. It is in the form of "raysubmit_12345...". It is a secondary id that can be used if a client needs to provide a self-generated id. or if the job id doesn't exist (ex: if the submission job doesn't create a ray driver)
This PR has 2 deprecations
- The `submit_job` sdk now accepts a new kwarg `submission_id`. `job_id is deprecated.
- The `ray job submit` CLI now accepts `--submission-id`. `--job-id` is deprecated.
**This PR has 4 backwards incompatible changes:**
- list_jobs sdk now returns a list instead of a dictionary
- the `ray job list` CLI now prints a list instead of a dictionary
- The `/api/jobs` endpoint returns a list instead of a dictionary
- The `POST api/jobs` endpoint (submit job) now returns a json with `submission_id` field instead of `job_id`.
