fix: Add container detection for other container runtimes

[DominicLavery]

Pull Request Submission Checklist

• Follows CONTRIBUTING guidelines
• Includes detailed description of changes
• Contains risk assessment (Low | Medium | High)
• Highlights breaking API changes (if applicable)
• Links to automated tests covering new functionality
• Includes manual testing instructions (if necessary)
• Updates relevant GitBook documentation (PR link: ___)
• Includes product update to be announced in the next stable release notes

What does this PR do?

This PR enables the container detection to work in container runtimes other than docker such as Podman and cri-o by checking for an additional file /run/.containerenv. This is a low risk change as it follows an established pattern in the codebase and has minimal changes.

Where should the reviewer start?

src/lib/is-docker.ts

How should this be manually tested?

Run the regression-tests tests inside a podman container

What's the product update that needs to be communicated to CLI users?

The CLI should no longer try and open a browser automatically when run in container environments other than dockers

Any background context you want to provide?

This relates to support request #159183 with CircleCI and should resolve issues running tests on the new container runtime.

[CLAassistant]

All committers have signed the CLA.