Description of problem:
We need to add additional examples to the install guide for configuring osd's to cover more customer scenarios.

Doc: https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/4/html/installation_guide/deploying-red-hat-ceph-storage#installing-a-red-hat-ceph-storage-cluster_install

1. Mixed media hosts without utilizing nvmes for block.db.
2. Mixed OSD counts from OSD node to OSD node.
3. Utilizing the /etc/hosts config for devices.

Version-Release number of selected component (if applicable):
4.0

How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info: