Fix msvc stdout issues with cl/link

[Repiteo]

There's been a long-standing issue with msvc when using the cl/link tools: their stdout choices are abysmal. They will always have a line of bloat with absolutely no arguments to circumvent it & will frequently put error messages on stdout instead of stderr. This PR addresses both issues at once with a modified implementation of a SPAWN fix used in the Godot repo¹. The main change is this is directly built into the spawn function itself, branching off if cl or link is the leading argument.

Contributor Checklist:

• I have created a new test or updated the unit tests to cover the new/changed functionality.
• I have updated CHANGES.txt (and read the README.rst)
• I have updated the appropriate documentation

Footnotes

1. https://github.com/godotengine/godot/pull/90551 ↩

[jcbrill]

Link to Godot issue for details concerning implementation issues and notes:
godotengine/godot#91883

[bdbaddog]

I don't think we can merge your implementation.

1. We'd have to do a deprecation cycle as this changes default behavoir
2. You're adding tool specific logic in the core of the tool. We could probably merge an implementation where the output filtering was provided by the tool on a tool by tool basis.

If you're interested in taking a shot at #2, please come discuss on discord server and/or open a new PR with your initial implementation.