Dogfood the SDK in our own PowerShell automation

[jamescrosswell]

Use the `Sentry` PowerShell module in our own PS automation as a real-world dogfooding exercise. Projects in `sentry-sdks` are probably good enough candidates since the automations there already exist to support the SDKs.

Extracted from #27.

[linear-code]

POWERSH-16

[vaind]

one option is to finish this pr: getsentry/app-runner#19