Backport of [ui] Show task events in the sidebar into release/1.4.x

[hc-github-team-nomad-core]

Backport

This PR is auto-generated from #15733 to be assessed for backporting due to the inclusion of the label backport/1.4.x.

WARNING automatic cherry-pick of commits failed. Commits will require human attention.

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

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Shows Task Events in the Nomad UI sidebar. Accessible via Job or Task Group pages.
Resolves #15730

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1 out of 2 committers have signed the CLA.

• philrenaud
• temp

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[github-actions]

Ember Asset Size action

As of 44c9431

Files that got Bigger 🚨:

File	raw	gzip
nomad-ui.js	+2.04 kB	+251 B
nomad-ui.css	+216 B	+33 B

Files that stayed the same size 🤷‍:

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

[github-actions]

Ember Test Audit comparison

	release/1.4.x	44c9431	change
passes	1422	1422	0
failures	0	0	0
flaky	0	0	0
duration	10m 06s 635ms	10m 48s 238ms	+41s 603ms

[github-actions]

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