Deprecate showing drive capacity and total free

[harshavardhana]

Description

Deprecate showing drive capacity and total free

Motivation and Context

This addresses a situation that we shouldn't be
displaying Total/Free anyone instead we should simply
show the total usage.

How Has This Been Tested?

Manually

Types of changes

• 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 change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added unit tests to cover my changes.
• I have added/updated functional tests in mint. (If yes, add mint PR # here: )
• All new and existing tests passed.

[kannappanr]

LGTM

[codecov]

Codecov Report

Merging #5976 into master will decrease coverage by 0.02%.
The diff coverage is 54.54%.

@@            Coverage Diff             @@
##           master    #5976      +/-   ##
==========================================
- Coverage   59.66%   59.63%   -0.03%     
==========================================
  Files         215      215              
  Lines       30888    30868      -20     
==========================================
- Hits        18428    18408      -20     
+ Misses      10917    10916       -1     
- Partials     1543     1544       +1

Impacted Files	Coverage Δ
cmd/xl-sets.go	58.56% <ø> (-0.09%)	⬇️
pkg/madmin/info-commands.go	0% <ø> (ø)	⬆️
cmd/xl-v1.go	85.84% <100%> (-0.72%)	⬇️
cmd/server-startup-msg.go	80.45% <40%> (-2.26%)	⬇️
cmd/posix.go	72.1% <50%> (+0.06%)	⬆️
cmd/fs-v1.go	66.95% <53.84%> (-0.49%)	⬇️
cmd/fs-v1-helpers.go	69.81% <0%> (+0.91%)	⬆️

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