ui: add choose template button

[ChaiWithJai]

Resolves #15546.

This PR creates a link (button) in the jobs.run view to allow a user to select a template to populate the job definition.

Current Design:

Figma Mock (has an a11y contrast violation):

Side Effects and notes:

• This PR updates the file directory to have a jobs/run and jobs/run/templates subdirectories.
• This PR populates dummy markup for acceptance tests.
• This PR doesn't make full use of styling in the Figma mocks because of a11y violations and waiting for #15582 to be merged in for appropriate component consumption.
• The original Figma mock (screenshot above) includes an a11y color contrast violation. To circumvent this issue we should default to using primary and secondary buttons given to us from HDS. This can be addressed in the subsequent PR.

[github-actions[bot]]

Ember Asset Size action

As of 889b098

Files that got Bigger 🚨:

File	raw	gzip
nomad-ui.js	+11.1 kB	+1.95 kB
nomad-ui.css	+488 B	+118 B

Files that stayed the same size 🤷‍:

File	raw	gzip
vendor.js	0 B	0 B
vendor.css	0 B	0 B

[github-actions[bot]]

Ember Test Audit comparison

	epic/job-templates	dace24f499f559d9d749672d1e9ae8cee8209274	change
passes	1453	1454	+1
failures	1	0	-1
flaky	0	0	0
duration	000ms	10m 42s 832ms	+10m 42s 832ms

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
nomad-storybook-and-ui	🔄 Building (Inspect)		Dec 21, 2022 at 9:27PM (UTC)

[github-actions[bot]]

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