Copyobject: Filter all encryption headers in gateway

[kannappanr]

Fixes #9655

Description

X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id and X-Amz-Server-Side-Encryption-Context headers were not removed from the source object causing partial encryption headers to be passed to the backend. This caused a failure in copyobject.

Motivation and Context

Issue #9655

How to test this PR?

Using the steps described in #9655

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: )

[minio-trusted]

Mint Automation

Test	Result
mint-xl.sh	✔️
mint-large-bucket.sh	✔️
mint-fs.sh	✔️
mint-dist-xl.sh	✔️
mint-gateway-s3.sh	✔️
mint-gateway-azure.sh	✔️
mint-gateway-nas.sh	✔️
Deleting image on docker hub
Deleting image locally