NFS: Create only one OSD pool for NFS Ganesha

[claudiubelu]

Description

Please include a summary of the changes and the related issue. Also include relevant
motivation and context. List any dependencies that are required for this change.

If it fixes a reported issue, mention it here, i.e.:
Fixes #

Type of change

Delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Clean code (code refactor, test updates; does not introduce functional changes)
• Documentation update (change to documentation only)

How has this been tested?

Note

All functional changes should accompany corresponding tests (unit tests, functional tests, etc.).

Please describe the addition/modification of tests done to verify this change. Also list any
relevant details for your test configuration.

Contributor checklist

Please check that you have:

• self-reviewed the code in this PR
• added code comments, particularly in less straightforward areas
• checked and added or updated relevant documentation
• checked and added or updated relevant release notes
• added tests to verify effectiveness of this change