[Pools] Cleaner Worker Assignment UX

[lloyd-brown]

In #7406 we introduced showing the user the replica their job is assigned to on job launch. Upon further thought there are a couple issue with this:

1. A job may not get assigned immediately in the case that a pool is exhausted or provisioning, in this case this logic doesn't display anything which is not ideal.
2. When we are launching a large number of jobs with --num-jobs we get many messages which is poor UX.

Instead we remove this logic and don't display on jobs launch, but we add logic to sky jobs queue to display the worker assignment. We do this by adding a call to pool status in sky jobs queue that we perform in parallel to our managed_jobs.queue() call. The result looks like this:

I added a smoke test to make sure we display this in sky jobs queue.

Tested (run the relevant ones):

• Code formatting: install pre-commit (auto-check on commit) or bash format.sh
• Any manual or new tests for this PR (please specify below)
• All smoke tests: /smoke-test (CI) or pytest tests/test_smoke.py (local)
• Relevant individual tests: /smoke-test -k test_name (CI) or pytest tests/test_smoke.py::test_name (local)
• Backward compatibility: /quicktest-core (CI) or pytest tests/smoke_tests/test_backward_compat.py (local)

[lloyd-brown]

/smoke-test

[lloyd-brown]

/smoke_test -k test_pools

[lloyd-brown]

/smoke-test

[lloyd-brown]

/smoke_test

[lloyd-brown]

/smoke-test

[lloyd-brown]

/quicktest-core