Ensure consistent code style in Powershell and Bash scripts

We are not 100 % consistent with indentation style in PowerShell, using a mix of _Allman_ and _Kernighan & Ritchie_ styles.

It probably doesn't matter which one we pick, as long as we're consistent... This is really just for code readability.

Also not the kind of thing we want to spend human processing power on. We should add something to the [format workflow](https://github.com/getsentry/sentry-dotnet/blob/main/.github/workflows/format-code.yml) in CI to ensure consistent coding style for our scripts.

_Originally posted by @Flash0ver in https://github.com/getsentry/sentry-dotnet/pull/4406#discussion_r2250909042_