Fixes #1997

…icy condition. (#2001)

…1999)"

This reverts commit 2a9a820.

Requires TrailingHeaders to be enabled on the client.

Mint test updated.

Verified against AWS:

```
{"time":"2024-09-19T12:54:20.5068834+02:00","level":"INFO","name":"minio-go: testPutObjectWithChecksums","duration":3504,"function":"PutObject(bucketName, objectName, reader,size, opts)","args":{"bucketName":"minio-go-test-qgn9l4slibugev06","checksum":"SHA256","objectName":"9oady6pvtp30mjatsc2141txeex5vc","opts":"minio.PutObjectOptions{UserMetadata: metadata, Progress: progress}"},"status":"PASS"}
{"time":"2024-09-19T12:54:24.1432974+02:00","level":"INFO","name":"minio-go: testPutObjectWithTrailingChecksums","duration":2742,"function":"PutObject(bucketName, objectName, reader,size, opts)","args":{"bucketName":"minio-go-test-wxrdafbi5xofe9pq","checksum":"SHA256","objectName":"ih64zss0yjp4g2v5xt1atg6y9ouwwk","opts":"minio.PutObjectOptions{UserMetadata: metadata, Progress: progress, TrailChecksum: xxx}"},"status":"PASS"}
{"time":"2024-09-19T12:58:44.9830104+02:00","level":"INFO","name":"minio-go: testPutMultipartObjectWithChecksums","duration":259866,"function":"PutObject(bucketName, objectName, reader,size, opts)","args":{"bucketName":"minio-go-test-40wbkvvk55n5whld","checksum":"SHA256","objectName":"c4kvdfsdcvzk94j1oudy9th6es6cvy","opts":"minio.PutObjectOptions{UserMetadata: metadata, Progress: progress Checksum: false}"},"status":"PASS"}
{"time":"2024-09-19T12:59:22.7002636+02:00","level":"INFO","name":"minio-go: testPutMultipartObjectWithChecksums","duration":36731,"function":"PutObject(bucketName, objectName, reader,size, opts)","args":{"bucketName":"minio-go-test-mwfrpr43lfe6sc6o","checksum":"SHA256","objectName":"1m3fzred3ldar5gl253gspan0ltzma","opts":"minio.PutObjectOptions{UserMetadata: metadata, Progress: progress Checksum: true}"},"status":"PASS"}
```

- Fix up testGetObjectAttributes using non-explicit checksum
- Fix TLS transports, with SKIP_CERT_VALIDATION