Fix incorrect ErrorAction values

[ghost]

I noticed in the logs of my editor's Language Server Protocol client that PowerShellEditorServices was throwing errors from commands with -ErrorAction Ignore in them. I checked to be sure, and Ignore isn't the correct value; SilentlyContinue does that.

I searched the codebase and fixed the three instances of the Ignore value I found.

[ghost]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

❌ alexbuzzbee sign now
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[ghost]

I'm reasonably confident these changes aren't copyrightable, but I'll get permission from whoever needs to approve this on my company's side and sign it later.

[andyleejordan]

Just FYI @alexbuzzbee we really appreciate the PR, but all of these are getting changed in some major overhaul work currently under review. This will likely end up with a merge conflict (but also no longer be needed), so I'm going to close it, but thank you! If you have the inclination, look at #1459