feat(sweeps): Look for launch job in sweep config

[hu-po]

Fixes WB-10606

Description

When running a sweep via the CLI, the job field can now be specified both in the sweep config and the launch config (with the sweep config taking precedence).

Testing

How was this PR tested?

Checklist

• Include reference to internal ticket "Fixes WB-NNNN" (and github issue "Fixes #NNNN" if applicable)

[codecov]

Codecov Report

Merging #4120 (ab709f4) into master (cce611e) will decrease coverage by 0.03%.
The diff coverage is 71.42%.

❗ Current head ab709f4 differs from pull request most recent head ead2cdb. Consider uploading reports for the commit ead2cdb to get more accurate results

@@            Coverage Diff             @@
##           master    #4120      +/-   ##
==========================================
- Coverage   82.74%   82.70%   -0.04%     
==========================================
  Files         256      256              
  Lines       32561    32515      -46     
==========================================
- Hits        26941    26892      -49     
- Misses       5620     5623       +3     

Flag	Coverage Δ
functest	54.99% <0.00%> (+0.13%)	⬆️
unittest	73.44% <71.42%> (-0.09%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
wandb/cli/cli.py	69.01% <71.42%> (+0.01%)	⬆️
wandb/sdk/wandb_watch.py	74.54% <0.00%> (-6.94%)	⬇️
wandb/sdk/lib/sock_client.py	89.92% <0.00%> (-2.34%)	⬇️
wandb/wandb_torch.py	59.93% <0.00%> (-1.36%)	⬇️
wandb/sdk/internal/internal_api.py	86.50% <0.00%> (-0.52%)	⬇️
wandb/sdk/wandb_setup.py	88.50% <0.00%> (-0.50%)	⬇️
wandb/sdk/service/service.py	89.87% <0.00%> (-0.49%)	⬇️
wandb/sdk/lib/git.py	79.01% <0.00%> (ø)
wandb/apis/public.py	82.63% <0.00%> (+0.19%)	⬆️
wandb/sdk/internal/meta.py	90.79% <0.00%> (+3.06%)	⬆️

[KyleGoyette]

🚢