Fleet pre-populates largely non-functional install scripts for EXEs

[iansltx]

Fleet version: <= 4.65.0

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💥  Actual behavior

Default install scripts for EXEs don't work for a large number of packages.

🧑‍💻  Steps to reproduce

1. Upload Slack, Zoom, 1Password, Google Drive, or Chrome EXE installers without overriding the install script.
2. Try to install the software.

🕯️ More info

This was noted in #20000, and we include a comment at the top of

🛠️ To fix

While we may be able to get better at detecting command line arguments for installers that will work, for now it's better to force admins to provide an install script based on our docs, and encourage them to use an MSI installer where available, rather than having an unreliable default. This is a similar approach to #26692.