Add name, description and expiration support for service accounts

[ribetm]

Add name, description and expiration support for service accounts

Changes

Allows setting 3 new attributes on service accounts:

• name: optional string
• description: optional string
• expiration: optional date, in RFC3339 format

Compatibility

All of these fields are optional, making it backward compatible.

Users may see a change on expiration from null to 1970-01-01T00:00:00Z (which are equivalent), but only if something else is updated. As far as I know there is no way around this, since Terraform considers null as untracked while Minio sees it as either epoch for creations, or as no change for updates.

Remarks

I've included argument validation matching Minio's API requirements:

• name must be 32 bytes max
• description must be 256 bytes max
• expiration must be between +15mn and +1y

Allowing invalid values to be sent to the API would throw relatively unclear errors, especially without verbose logging

[ribetm]

When I generated the docs with task generate-docs, it changed more than what I added. I only included what's related to my PR for now.

With a quick glance at the other changes, it may seem related to the new v3 schema

[felladrin]

Congrats on your first contribution to this repository, @ribetm! All clear! Let's merge and release it as v3.1.0! 🎉