This pull request updates the documentation for the dotnet test command to clarify limitations when specifying certain parameters at the solution level. The changes help users avoid common pitfalls by highlighting that some options must be set at the project level instead of the solution level.

Documentation improvements:

• Added a note explaining that specifying the Architecture for test runs is not supported at the solution level, and should be set per project if needed.
• Added a note clarifying that setting a Runtime Identifier for test runs is also not supported at the solution level, and should be set per project if needed.

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