Disable some output messages by default

[spajus]

Describe the bug.

Since an update that happened a few months ago, every time vscode starts or extensions reload, I have to close the bottom tray because it auto opens to display the Output tab for .NET Install Tool with the following messages:

ms-dotnettools.csharp: Trying to install .NET 9.0.7~x64~aspnetcore but it already exists. No downloads or changes were made.
ms-dotnettools.csharp: Trying to install .NET 9.0.7~x64~aspnetcore but it already exists. No downloads or changes were made.
visualstudiotoolsforunity.vstuc: Trying to install .NET 9.0.7~x64 but it already exists. No downloads or changes were made.
ms-dotnettools.csdevkit: Trying to install .NET 9.0.7~x64~aspnetcore but it already exists. No downloads or changes were made.

It's quite annoying. Is it possible to disable this behavior?

Reproduction Steps

Open VSCode or reload extensions.

Expected Behavior

Bottom tray with Output does not open automatically.

Exceptions & Errors (if any)

No response

.NET Install Tool Version

v2.3.6

Your operating system? Please provide more detail, such as the version and or distro above.

Windows

VS Code Version

1.102.0

[nagilson]

I have an outstanding PR to add a way to disable that #2332

Perhaps we should disable that message by default, though.

[nagilson]

We should also probably try to disable the use existing path setting message unless a higher verbosity mode is selected.

[nagilson]

@claudiaregio FYI: This is one of the issues w.r.t to UX that I mentioned prior.