Backport of [UI] removes ember-cli-template-lint and updates customElement addon to fi… into release/1.22.x

[hc-github-team-consul-core]

Backport

This PR is auto-generated from #23006 to be assessed for backporting due to the inclusion of the label backport/1.22.

🚨

Warning automatic cherry-pick of commits failed. If the first commit failed,
you will see a blank no-op commit below. If at least one commit succeeded, you
will see the cherry-picked commits up to, not including, the commit where
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The person who merged in the original PR is:
@suresh-hashicorp
This person should resolve the merge-conflict(s) by either:

• Manually completing the cherry picks into this branch
• Creating a new branch and manually cherry-picking all commits being backported

merge conflict error: POST https://api.github.com/repos/hashicorp/consul/merges: 409 Merge conflict []

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

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…x template-compiler.registerPlugin deprecation

Description

Fixes https://deprecations.emberjs.com/id/template-compiler-registerplugin/ .

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Overview of commits

• f7afb79

[github-team-consul-core-pr-approver]

Auto approved Consul Bot automated PR

[hashicorp-cla-app]

All committers have signed the CLA.