Update cake monorepo to v5 (major)

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Cake.Frosting (source)	4.2.0 -> 5.0.0
Cake.Testing (source)	4.0.0 -> 5.0.0
cake.tool (source)	4.2.0 -> 5.0.0

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Release Notes

cake-build/cake (Cake.Frosting)

v5.0.0

• #​4384 Remove obsolete members / methods.
• #​4383 Update LatestPotentialBreakingChange to 5.0.0.
• #​4346 Remove Unsupported TFMS .NET 6 & 7 (net6.0 & net7.0).
• #​4396 Add DotNetSlnAdd alias for dotnet sln add command.
• #​4393 Add DotNetSlnList alias for dotnet sln list command.
• #​4379 C# 13 Scripting Support.
• #​4345 Add .NET 9 (net9.0) TFM.
• #​4310 Update Cake.Tool to support running on FreeBSD.
• #​4391 DownloadArtifacts errors in latest Cake 4.2.0 with 404 error.

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Configuration

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[nils-a]

We'll do this in #291

[renovate]

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