Request to create semconv-system-approver

[AlexanderWert]

I'd like to request creating a new approver group semconv-system-approver and add the following approvers to that group:

• @ChrsMark
• @dmitryax
• @frzifus
• @kaiyan-sheng
• @mx-psi

This group would be the code-owner for system-related semantic conventions including system-related resource (host, container, k8s, etc.) attributes as well as system metrics.

[mx-psi]

@arminru What should be the next steps for this?

[arminru]

I created https://github.com/orgs/open-telemetry/teams/semconv-system-approvers and added the initial members.

@kaiyan-sheng please follow the steps described here to join the OTel Github org so I can add you as well:
https://github.com/open-telemetry/community/blob/main/community-membership.md#member

@mx-psi The next steps would be to adapt the CODEOWNERS file in this repo here to add the new @open-telemetry/semconv-system-approvers group to the respective sub-folders/files.

[mx-psi]

Thanks! See #309 :)