* Docs: Vault integration

* Add links to vault feature doc

* Update Enterprise configuration file with vault fields

* Small fixes on vault doc

* Update docs according to PR review

* Update docs/sources/administration/configuration.md

Co-authored-by: Leonard Gram <leo@xlson.com>

* Update docs/sources/enterprise/vault.md

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

* Update docs/sources/enterprise/vault.md

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

Co-authored-by: Emil Tullstedt <emil.tullstedt@grafana.com>
Co-authored-by: Leonard Gram <leo@xlson.com>
Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>