Update CopyObjectRequestMarshaller to throw ArgumentException for missing properties

[muhammad-othman]

Description

CopyObject request is throwing unmeaningful exception when one of its required parameters is missing (except DestinationBucket which is handled correctly).

Motivation and Context

A customer raised this issue #3193 when using CopyObjectAsync.

Testing

• Tested the same code that was included in the issue and added unit tests to cover all cases of missing properties.
• Did a full dry run DRY_RUN-d3c91a42-e7d1-4c82-ba55-7a4cd64112e0.

Screenshots (if appropriate)

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 read the README document
• I have added tests to cover my changes
• All new and existing tests passed

License

• I confirm that this pull request can be released under the Apache 2 license