MSB6006 should special case STATUS_CONTROL_C_EXIT

When hitting Ctrl-C during a build, if a child tool was terminated by MSBuild as part of cancelation, you will get something like
```
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(1235,5): error MSB6006: "Lib.exe" exited with code -1073741510. [C:\git\coreclr\bin\obj\Windows_NT.x64.Release\src\vm
\crossgen\cee_crossgen.vcxproj]
```
-1073741510. of course is 0xC000013A: STATUS_CONTROL_C_EXIT

Since this is "by design" (MSBuild working properly) perhaps this code could special case it and give a message like `error MSB6006: "Lib.exe" exited because it was canceled` which looks less like something different went wrong during cancelation.

https://github.com/microsoft/msbuild/blob/b2db71bebaae4f54f7236ca303e2b0a14aca1a0d/src/Utilities/ToolTask.cs#L383-L386

Start in src/Utilities/ToolTask.cs at the referenced handling around lines 383-386, and trace how the child process exit code is turned into MSB6006 output. Treat 0xC000013A (STATUS_CONTROL_C_EXIT) as cancellation and confirm the resulting message describes cancellation rather than a generic tool failure.

Written by the indexing model from the issue text.