Backport of [ui] Volumes and plugins navigation fixes, generally into release/1.9.x

[hc-github-team-nomad-core]

Backport

This PR is auto-generated from #24542 to be assessed for backporting due to the inclusion of the label backport/1.9.x.

The below text is copied from the body of the original PR.

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Description

Mainly, this fixes a bug where navigating to a volume from the Storage page would error. This was happening because it was escaping the / after the csi/ prefix that Ember Data uses to route things. I made a similar bugfix a few months ago for plugins, but didn't think to check volumes as well

Additionally, found a few more quality-of-life around navigation within storage:

• There was no keyboard nav for the plugins index table
• the u keyboard shortcut would pass more info than needed to get from /volumes/:id back to /volumes (this is because it's one level more nested than most breadcrumb up-a-level nav; /storage/plugins and /storage are the same page, as far as breadcrumbs are concerned)
• Enumerated keyboard nav to load a volume from the index page was not working, even after the above csi/ slash escaping bug was fixed; this was because the DOM event being passed to our lazyClick method (to simulate clicking on a row when you type in a keynav combo, in this case) was coming back null. There's now a defensive Elvis (?.) to return a falsy value in lazyClick.

Testing & Reproduction steps

Make some volumes/plugins and navigate around to your heart's content

Resolves #23831

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Overview of commits

• 76e39b1

[github-actions]

Ember Test Audit comparison

	release/1.9.x	862ef59	change
passes	1580	1580	0
failures	5	5	0
flaky	0	0	0
duration	000ms	000ms	-000ms

[github-actions]

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