Avoid plugging in TerminalOutputDevice when running with pipe protocol

[Youssef1313]

No description provided.

[Copilot]

Pull request overview

Updates the dotnet-test pipe protocol integration so the platform can avoid wiring the default terminal output device, aiming to prevent MTP output from interfering with dotnet test live output.

Changes:

• Expand pipe-protocol supported versions to include 1.0.1 and advertise them during handshake.
• Allow ProxyOutputDevice/PlatformOutputDeviceManager to operate without a terminal output device when running under pipe protocol.
• Adjust TestHostBuilder protocol detection to decide when pipe protocol is active and influence output-device construction.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/Platform/Microsoft.Testing.Platform/ServerMode/DotnetTest/IPC/Constants.cs	Replaces single protocol version with a semicolon-delimited supported-versions list and documents 1.0.1.
src/Platform/Microsoft.Testing.Platform/ServerMode/DotnetTest/DotnetTestConnection.cs	Sends supported versions during handshake using the new constants.
src/Platform/Microsoft.Testing.Platform/OutputDevice/ProxyOutputDevice.cs	Makes the wrapped platform output device nullable and guards calls accordingly.
src/Platform/Microsoft.Testing.Platform/OutputDevice/OutputDeviceManager.cs	Suppresses creation of the default terminal output device for pipe protocol (currently by returning null).
src/Platform/Microsoft.Testing.Platform/Hosts/TestHostBuilder.cs	Detects jsonrpc vs pipe protocol and passes protocol info into output-device construction.

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[Copilot]

Pull request overview

Updates Microsoft.Testing.Platform’s output-device wiring so that when running under the dotnet-test pipe protocol, the default TerminalOutputDevice is not installed (avoiding interference with SDK live output), while keeping the rest of the host/service construction flow intact.

Changes:

• Make the platform output device optional (nullable) and guard call sites accordingly.
• Introduce pipe-protocol detection and skip creating the default terminal output device in that mode.
• Expand dotnet-test IPC protocol constants to advertise multiple supported versions.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/Platform/Microsoft.Testing.Platform/Services/ServiceProviderExtensions.cs	Makes GetPlatformOutputDevice nullable (non-required service).
src/Platform/Microsoft.Testing.Platform/ServerMode/DotnetTest/IPC/Constants.cs	Replaces single protocol version constant with a supported-versions list and adds explanatory comments.
src/Platform/Microsoft.Testing.Platform/ServerMode/DotnetTest/DotnetTestConnection.cs	Sends supported protocol versions during handshake.
src/Platform/Microsoft.Testing.Platform/OutputDevice/ProxyOutputDevice.cs	Allows OriginalOutputDevice to be null and guards dispatch calls.
src/Platform/Microsoft.Testing.Platform/OutputDevice/OutputDeviceManager.cs	Skips default terminal output device creation when in pipe protocol.
src/Platform/Microsoft.Testing.Platform/Hosts/TestHostBuilder.cs	Detects pipe protocol; avoids registering/initializing a terminal output device in that scenario.
src/Platform/Microsoft.Testing.Platform/Hosts/TestFrameworkBuilderData.cs	Allows PlatformOutputDisplayService to be null.

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