chore(deps): update dotnet monorepo to v7 (major)

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
Microsoft.Extensions.DependencyInjection (source)	nuget	major	6.0.1 -> 7.0.0
System.Text.Json (source)	nuget	major	6.0.7 -> 7.0.3
System.Threading.Channels (source)	nuget	major	6.0.0 -> 7.0.0

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Release Notes

dotnet/runtime (Microsoft.Extensions.DependencyInjection)

### [`v7.0.0`](https://togithub.com/dotnet/runtime/releases/tag/v7.0.0): .NET 7.0.0 [Release](https://togithub.com/dotnet/core/tree/v7.0.0)

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Configuration

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🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Never, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

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