[SBOM] Add information about the build environment / runner

[netomi]

Adding information about the jenkins runner itself that executes the build would allow to identify the exact build environment that has been used during a build.

The idea would be to include information like:

• docker image with digest that is being used to spin up the runner
• ansible playbook that was used to build the docker image (might not be needed if we have the above)

[sxa]

Noting that for the LInux builds, the digest is already included e.g.

      {
        "name" : "Docker image SHA1",
        "version" : "adoptopenjdk/centos6_build_image@sha256:c3e6eb8bb1067568ca63929b75e1fb8ddcb7cbe3b12699811cc81e2233d33e59"
      }

[sxa]

We could add the contents of the NODE_NAME environment variable too.

[sxa]

I believe this is good to close with the above PR