Clarify necessary permissions in README

[kwin]

Please clarify which roles the users needs to have for which API in order to reset and deploy to an RDE. Particularly as only resetRde is documented at https://developer.adobe.com/experience-cloud/cloud-manager/guides/getting-started/permissions/.

[RemoLiechti]

the decision was made to not document these right now as they may change in near future.

[kwin]

Although this is a strange decision to me, please leave this issue open until it is documented.