tier: Add hidden --force to remove tiering command

[vadmeste]

Community Contribution License

All community contributions in this pull request are licensed to the project maintainers
under the terms of the Apache 2 license.
By creating this pull request I represent that I have the right to license the
contributions to the project maintainers under the Apache 2 license.

Description

To ensure that the server can remove an internal tier configuration
when the tiering is unreachable or other corner cases where it is not
possible for the server to determine if the tier contains some data
or fully empty.

Motivation and Context

Add the possiblity to remove a tier in some cases

How to test this PR?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Optimization (provides speedup with no functional changes)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Unit tests added/updated
• Internal documentation updated
• Create a documentation update request here