feat(copy): add conditional destination copy

[dentiny]

Which issue does this PR close?

Closes #7599

Rationale for this change

Conditional copy, which checks the existence and version for target is supported in S3.
Reference:

• Copy object: https://docs.aws.amazon.com/AmazonS3/latest/API/API_CopyObject.html#API_CopyObject_RequestSyntax
• Multiple part copy is basically the same as multipart upload, initiation/abort/complete requests are the same: https://docs.aws.amazon.com/AmazonS3/latest/API/API_CompleteMultipartUpload.html#API_CompleteMultipartUpload_RequestSyntax

What changes are included in this PR?

This PR adds conditional copy feature in S3 against target object.

Are there any user-facing changes?

Yes, users are able to do conditional copy.

AI Usage Statement

Opus 4.7 made all the code change for me.

[Xuanwo]

Thank you!