chore(smoke-tests): use fs.existsSync instead of running compass to verify installs COMPASS-9406

[kraenhansen]

Description

This is an attempt to make the smoke / install tests less brittle by asserting the existence of the Compass executable instead of actually running it.

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added
• If this change updates the UI, screenshots/videos are added and a design review is requested
• I have signed the MongoDB Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)

Motivation and Context

• Bugfix
• New feature
• Dependency update
• Misc

Open Questions

Dependents

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)

[kraenhansen]

I've restarted the task 5 times and it's passed every time 🎉

[lerouxb]

yay! We could also do this the same for the other platforms.

[gribnoysup]

@kraenhansen hope you don't mind, I'll merge it to see if the cloud bot will be satisfied by this fix 😄