[Bug] - versitygw REST DeleteObjects command doesn't require Content-MD5 or checksum header

[lrm25]

Describe the bug
If a REST DeleteObjects command is sent without a Content-MD5 or checksum header, an error similar to the following is returned:

<Error><Code>InvalidRequest</Code><Message>Missing required header for this request: Content-MD5 OR x-amz-checksum-*</Message><RequestId>QKSB6PEC5MC19HFB</RequestId><HostId>0Ewj3m2sa0RhUIUqv5c3OKbJc5KCEf/FcVQ6tvvbmZh5P+tNK72GRdYH7ERWRRNNHb+BFdNa4xk=</HostId></Error>

versitygw doesn't require this, and just returns the standard successful DeleteObjects response.

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 a bucket, e.g.: aws --no-verify-ssl s3api create-bucket --bucket versity-gwtest-bucket-one-1
3. Send a REST DeleteObjects command without a content-md5 header. It should look like this: curl -ks -w %{http_code} -X POST https://localhost:7070/versity-gwtest-bucket-one-1?delete -H Authorization: AWS4-HMAC-SHA256 Credential=********/20250121/us-east-1/s3/aws4_request,SignedHeaders=host;x-amz-content-sha256;x-amz-date,Signature=9ddb3eba5ddf3a332db585f741142ad650eaa28b23624525f33429186c32ba02 -H x-amz-content-sha256: f3cb07c8b87063ff05ddb3bdc06f6e2f966ecb85169d4cdb23e113bfdcfac07e -H x-amz-date: 20250121T172339Z -H Content-Type: application/xml -o /Users/lukemccrone/devel/versitygw/versity-gwtest-files/result.txt -d <Delete xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <Object> <Key>test_file</Key> </Object> <Object> <Key>test_file_two</Key> </Object> </Delete>

Expected behavior
As with direct, error is returned.

Server Version
Version : v1.0.9
Build : 1718f85
BuildTime: 2025-01-21_04:33:10PM
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