Revert "chore: Skip setting process priority when running on non windows environment"

[adamsitnik]

Reverts #2924 for reasons described here: #2924 (review)

[filzrev]

@adamsitnik
Sorry, I don't noticed usage scenarios that run benchmarks as root users.

Is it acceptable to add logics to skip setting process priority when running on running GitHub Actions Hosted runner
by using following code?

Additional code to Portablity/RuntimeInformation.cs

// GitHub Actions environment variables https://docs.github.com/en/actions/reference/workflows-and-actions/variables#default-environment-variables
public static readonly bool IsRunningOnGitHubActions = Environment.GetEnvironmentVariable("GITHUB_ACTIONS") == "true";

public static readonly bool IsRunningOnGitHubHostedRunner = IsRunningOnGitHubActions
                                                                 && Environment.GetEnvironmentVariable("RUNNER_ENVIRONMENT") == "github-hosted";

[adamsitnik]

@adamsitnik Sorry, I don't noticed usage scenarios that run benchmarks as root users.

No problem. I have developed this skill after years of working on the .NET Team and being constantly warned about very subtle breaking changes.

Is it acceptable to add logics to skip setting process priority when running on running GitHub Actions Hosted runner by using following code?

Additional code to Portablity/RuntimeInformation.cs

I would prefer us to modify the code that creates configs for tests and disable it there in explicit way. Because our users could in theory run as sudo using GH actions.