[Bug] - REST - GetObjectAttributes not returning ObjectParts element

[lrm25]

Describe the bug
Direct to s3, a query for the attributes "ETag,StorageClass,ObjectParts,ObjectSize" returns something similar to:

<?xml version="1.0" encoding="UTF-8"?>
   <GetObjectAttributesResponse xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><ETag>b8785a1b2e2fa28fc4a6b1a3eb6ecc68-4</ETag><ObjectParts><PartsCount>4</PartsCount></ObjectParts><StorageClass>STANDARD</StorageClass><ObjectSize>167772160</ObjectSize></GetObjectAttributesResponse>

Via versitygw, the ObjectParts element is missing.

To Reproduce

1. Start versitygw, e.g.: ./versitygw --access=******** --secret=******** --region=us-east-1 --iam-dir=/Users/lukemccrone/devel/versitygw/iam --cert /Users/lukemccrone/devel/versitygw/cert.pem --key /Users/lukemccrone/devel/versitygw/versitygw.pem posix --versioning-dir /tmp/versioning /tmp/gw
2. Create bucket, e.g.: aws --no-verify-ssl s3api create-bucket --bucket versity-gwtest-bucket-one-1
3. Create multipart upload using REST script, e.g.: curl -ks -w %{http_code} -X POST https://localhost:7070/versity-gwtest-bucket-one-1/test_file?uploads= -H Authorization: AWS4-HMAC-SHA256 Credential=********/20241223/us-east-1/s3/aws4_request,SignedHeaders=host;x-amz-content-sha256;x-amz-date,Signature=84e9ba790073f8f4eb7de09f8733008c843e6199c1fe2fc2eaecf7ec05b77ac9 -H x-amz-content-sha256: UNSIGNED-PAYLOAD -H x-amz-date: 20241223T200427Z -o /Users/lukemccrone/devel/versitygw/versity-gwtest-files/output.txt
4. Upload each part using REST script, e.g. (for one part): curl -isk -w %{http_code} https://localhost:7070/versity-gwtest-bucket-one-1/test_file?partNumber=1&uploadId=55260c0a-ce49-4ba3-aed6-73d9e2a00398 -H Authorization: AWS4-HMAC-SHA256 Credential=********/20241223/us-east-1/s3/aws4_request,SignedHeaders=host;x-amz-content-sha256;x-amz-date,Signature=b542b4bad7d9038e067c914b7d90be505a6bc841d056d44eb08d4d91636d90fc -H x-amz-content-sha256: af1d9f2e5d9a9e477c596914df5e2537e9b9b666a29c920ce8b5370904bbadba -H x-amz-date: 20241223T200427Z -o /Users/lukemccrone/devel/versitygw/versity-gwtest-files/etag.txt -T /Users/lukemccrone/devel/versitygw/versity-gwtest-files/test_file-0
5. After each part is uploaded, complete using REST script, e.g.: curl -ks -w %{http_code} -X POST https://localhost:7070/versity-gwtest-bucket-one-1/test_file?uploadId=55260c0a-ce49-4ba3-aed6-73d9e2a00398 -H Authorization: AWS4-HMAC-SHA256 Credential=********/20241223/us-east-1/s3/aws4_request,SignedHeaders=host;x-amz-content-sha256;x-amz-date,Signature=fd1b6d5200d36991f5c727a2bdd08316cb01258abfe1725b3d792ee87e466694 -H x-amz-content-sha256: 298c436fd1efa631b04ab52b57300d04da63585d4005892288bda8d00032f2b4 -H x-amz-date: 20241223T200450Z -H Content-Type: application/xml -d <CompleteMultipartUpload xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Part><ETag>9410f8e019970aa8e93501fe2e14efad</ETag><PartNumber>1</PartNumber></Part><Part><ETag>f81b7ba0038b1a0ba217312199d78a54</ETag><PartNumber>2</PartNumber></Part><Part><ETag>9c265e8d3c169b79e805198dea43441e</ETag><PartNumber>3</PartNumber></Part><Part><ETag>6072b4fd113858f4df3a215d85f83e42</ETag><PartNumber>4</PartNumber></Part></CompleteMultipartUpload> -o /Users/lukemccrone/devel/versitygw/versity-gwtest-files/result.txt
6. Query attributes (including ObjectParts) using REST script, e.g.: curl -ks -w %{http_code} https://localhost:7070/versity-gwtest-bucket-one-1/test_file?attributes= -H Authorization: AWS4-HMAC-SHA256 Credential=********/20241223/us-east-1/s3/aws4_request,SignedHeaders=host;x-amz-content-sha256;x-amz-date;x-amz-object-attributes,Signature=a574aa4f66a61a01fee4df111e30be483d722d5edf2174153771a96707d99a7c -H x-amz-content-sha256: UNSIGNED-PAYLOAD -H x-amz-date: 20241223T200450Z -H x-amz-object-attributes: ETag,StorageClass,ObjectParts,ObjectSize -o /Users/lukemccrone/devel/versitygw/versity-gwtest-files/attributes.txt

Expected behavior
ObjectParts element, wtih PartCount, is shown.

Server Version
Version : v1.0.9
Build : 91d3bbc
BuildTime: 2024-12-23_08:30:21PM
Darwin Lukes-MacBook-Pro.local 23.4.0 Darwin Kernel Version 23.4.0: Fri Mar 15 00:12:25 PDT 2024; root:xnu-10063.101.17~1/RELEASE_ARM64_T6030 arm64