heal: Do not print a cryptic msg when scanning a dangling object

[vadmeste]

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Description

Healing in server side will list with quorum 1, so it will pick stale objects as well. This is currently not rendered well in mc that shows this cryptic message:
Invalid parity shard count/surplus shard count given

Print the text sent by the server instead.

Motivation and Context

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