fix: multipart replication and encrypted etag for sse-s3 (#13171)

Replication was not working properly for encrypted
objects in single PUT object for preserving etag,

We need to make sure to preserve etag such that replication
works properly and not gets into infinite loops of copying
due to ETag mismatches.

cmd/fs-v1-metadata.go

@@ -29,8 +29,6 @@ import (
 	"time"
 
 	jsoniter "github.com/json-iterator/go"
-	"github.com/minio/minio/internal/crypto"
-	"github.com/minio/minio/internal/etag"
 	xhttp "github.com/minio/minio/internal/http"
 	"github.com/minio/minio/internal/lock"
 	"github.com/minio/minio/internal/logger"
@@ -170,11 +168,6 @@ func (m fsMetaV1) ToObjectInfo(bucket, object string, fi os.FileInfo) ObjectInfo
 
 	objInfo.ETag = extractETag(m.Meta)
 
-	et, e := etag.Parse(objInfo.ETag)
-	if e == nil {
-		objInfo.Multipart = et.IsMultipart()
-	}
-
 	objInfo.ContentType = m.Meta["content-type"]
 	objInfo.ContentEncoding = m.Meta["content-encoding"]
 	if storageClass, ok := m.Meta[xhttp.AmzStorageClass]; ok {
@@ -184,6 +177,7 @@ func (m fsMetaV1) ToObjectInfo(bucket, object string, fi os.FileInfo) ObjectInfo
 	}
 	var (
 		t time.Time
+		e error
 	)
 	if exp, ok := m.Meta["expires"]; ok {
 		if t, e = time.Parse(http.TimeFormat, exp); e == nil {
@@ -200,14 +194,6 @@ func (m fsMetaV1) ToObjectInfo(bucket, object string, fi os.FileInfo) ObjectInfo
 	// Tags have also been extracted, we remove that as well.
 	objInfo.UserDefined = cleanMetadata(m.Meta)
 
-	// Set multipart for encryption properly if
-	// not set already.
-	if !objInfo.Multipart {
-		if _, ok := crypto.IsEncrypted(objInfo.UserDefined); ok {
-			objInfo.Multipart = crypto.IsMultiPart(objInfo.UserDefined)
-		}
-	}
-
 	// All the parts per object.
 	objInfo.Parts = m.Parts