[ui] Fix a bug where redirects after planning/editing a job didn't include namespace

[philrenaud]

Previously, we treated namespaces like query parameters; however, this caused the onSubmit redirects to 404 when planning a job.

Side-effect: also introduces router service transition instead of depending on the deprecated transitionToRoute method.

Resolves #13039

[github-actions]

Ember Asset Size action

As of 1816ce2

Files that got Bigger 🚨:

File	raw	gzip
nomad-ui.js	+907 B	+337 B

Files that stayed the same size 🤷‍:

File	raw	gzip
vendor.js	0 B	0 B
nomad-ui.css	0 B	0 B
vendor.css	0 B	0 B

[github-actions]

Ember Test Audit comparison

	main	1816ce2	change
passes	1287	1287	0
failures	2	2	0
flaky	0	0	0
duration	000ms	000ms	-000ms

[github-actions]

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