Make the CMS teams less specific

[rustydb]

Summary and Scope

• Fixes: Waiting on CODEOWNERS for CMS even though CMS has already approved a PR.

Issue Type

• Docs Pull Request

CMS is broken up into 13 teams in GitHub. More often than not a qualified CMS team member will approve a PR but they won't exist in the sub-team specified in CODEOWNERS.

This change replaces the code owner for CMS items with the parent team, cray-management-systems.

Prerequisites

• I have included documentation in my PR (or it is not required)
• I tested this on internal system (if yes, please include results or a description of the test)
• I tested this on a vshasta system (if yes, please include results or a description of the test)

Idempotency

Risks and Mitigations