Upgrade `@typescript-eslint/utils` to v7

[Belco90]

• Upgrade typescript-eslint packages to v7
• Drop support for ESLint v7 and v8

[nathanmmiller]

@Belco90 this is probably a fairly huge undertaking. Is there any appetite for a simple patch release that would at least bump to v6, which seems like it could be a smaller step in the right direction?

[burtek]

NB: typescript-eslint v8 is already stable at this point

[github-actions]

🎉 This issue has been resolved in version 7.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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