Added detailed documentation for Stream.Read(Span<byte>) method.

[jisaiaha]

This pull request enhances the documentation for the Stream.Read(Span<byte>) method. The following improvements have been made:

• Exception Handling: Added detailed exception documentation for IOException, NotSupportedException, and ObjectDisposedException to ensure that developers are aware of the possible errors this method might throw.
• Expanded Remarks: Clarified the method's behavior, including how the buffer is handled, when the position within the stream is advanced, and how exceptions affect the stream's position.
• Streamlined Structure: Removed duplicated MemberSignature and ReturnValue blocks to improve readability and maintain a clean, concise structure.
• Preserved Compatibility Information: Retained all relevant framework compatibility information, including assembly and parameter details.

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Tagging subscribers to this area: @dotnet/area-system-io

[learn-build-service-prod]

Learn Build status updates of commit 82551fc:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
xml/System.IO/Stream.xml	⚠️Warning	View	Details

xml/System.IO/Stream.xml

• Line 0, Column 0: [Warning: ECMA2Yaml_CrefTypePrefixMissing] Invalid cref format (System.IO.IOException) detected in C:\LocalRun\W\3is5-s\xml\System.IO\Stream.xml
• Line 0, Column 0: [Warning: ECMA2Yaml_CrefTypePrefixMissing] Invalid cref format (System.NotSupportedException) detected in C:\LocalRun\W\3is5-s\xml\System.IO\Stream.xml
• Line 0, Column 0: [Warning: ECMA2Yaml_CrefTypePrefixMissing] Invalid cref format (System.ObjectDisposedException) detected in C:\LocalRun\W\3is5-s\xml\System.IO\Stream.xml

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