SCM: check permission alignment for `OWNER` and `MAINTAINER` role in groups and projects

This issue is to support the decisions and planning around Permission alignment for OWNER and MAINTAINER r... (#374607)

The tasks are outlined in #374607 and are quoted here:

• Please check for your team and features whether you have any rights associated with the OWNER or MAINTAINER role in a group or project.
  • How can you check? An engineer could look into the policy files.
  • If Yes for groups, add Y to the column Permissions available for group OWNER and MAINTAINER?
    • If No, add N to the column
  • If Yes for projects, add Y to the column Permissions available for project OWNER and MAINTAINER?
    • If No, add N to the column
• If you have answered Yes for the previous two columns, please check whether the permissions are aligned between group and project owners
  • If Yes for groups, add Y to the column Are group and project MAINTAINER and OWNER permissions aligned?
    • If No, add N to the column

To be able to answer the following question, please provide a list how the roles on the different levels are not aligned (if they are not aligned):

• If you have answered No in the column Are group and project MAINTAINER and OWNER permissions aligned?, please indicate whether you are planning to align these permissions in %16.0 in the column Are you planning to align them in 16.0? (Y / N)

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