Fix validation build tag

Move rename to LSP

Fix issue #26610

Support parenthesized expressions in use-compound-operator.

Rename should be a no-op if the name is unchanged

Fix official build YAML

Don't use System.HashCode if that type is not an accessible type.

Fix the list of allowed modifiers in the C# syntax generator.

Co-Authored-By: NJason Malinowski <jason@jason-m.com>

Reduce allocations in FindInnermostCommonNode.

Do not convert to 'var' if it would change tuple names

Fix simplification of parenthesized default expressions.

Reduce allocations in CodeGenService.

Add f1 support for 'nameof' keyword

Enable skipped tests

- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.20158.2
Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>