Add StandardInput/Output/Error SafeFileHandle properties and LeaveHandlesOpen to ProcessStartInfo#125848

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Commits on Mar 20, 2026

Add StandardInput/Output/Error SafeFileHandle properties to ProcessStartInfo

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Remove unrelated files from commit

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Address code review: fix pipe handle cleanup in tests

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Address review feedback: reuse CantRedirectStreams, add LeaveHandlesOpen property, improve XML docs

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Address feedback: handles don't need to be inheritable, mention OpenNullHandle/OpenStandard*Handle APIs, remove redundant Close() calls

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