Problem

We fail to parse the runtime when it is provided.al2 or provided.al2023. I don't though what's the impact though, because in Datadog logs, the runtime tag is shown correctly even if I removed all the env vars related to runtime.

This PR

Fix the problem by changing the path from /etc to /etc/os-release.

Thanks @shreyamalpani for the idea about the fix.

Test

Before

Failed to parse the runtime

After

Works for both al2 and al2023