(DOCSP-45572) AtlasCustomRole CRD (#165)

* (DOCSP-45572) Custom Role CRD

* (DOCSP-45572) Custom Role CRD

* (DOCSP-45572) Adding ToC links, removing Custom Role parameters

* (DOCSP-45572) Peripheral changes

- Add second example for independent CRD.
- Remove deprecated page about configuring custom roles.
- Add deprecation notice to the customRoles field.

* (DOCSP-45572) Name corrections.

* (DOCSP-45572) Content review.

Author: lmkerbey-mdb