additional fixes for copyobject to handle sse-c encrypted

[poornas]

replication

Description

Motivation and Context

Fix replication of metadata updates via CopyObject API on SSE-C encrypted objects
avoid infinite proxying on SSE-C encrypted objects

How to test this PR?

run mc replicate resync on already replicated content - will not log error on source
update tags on sse-c encrypted object - should replicate with this fix
mc cp with sse-c can lead to 429 Too many requests from infinite proxying because object options did not set opts.ProxyRequest for sse-c properly.

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:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Documentation needed
• Unit tests needed
• Functional tests needed (If yes, add mint PR # here: )

[klauspost]

Thanks. I don't understand it, but I trust it is good :)