fix: various performance improvements to tiering (#12965)

- deletes should always Sweep() for tiering at the
  end and does not need an extra getObjectInfo() call
- puts, copy and multipart writes should conditionally
  do getObjectInfo() when tiering targets are configured
- introduce 'TransitionedObject' struct for ease of usage
  and understanding.
- multiple-pools optimization deletes don't need to hold
  read locks verifying objects across namespace and pools.

cmd/object-api-options.go

@@ -219,6 +219,7 @@ func delOpts(ctx context.Context, r *http.Request, bucket, object string) (opts
 // get ObjectOptions for PUT calls from encryption headers and metadata
 func putOpts(ctx context.Context, r *http.Request, bucket, object string, metadata map[string]string) (opts ObjectOptions, err error) {
 	versioned := globalBucketVersioningSys.Enabled(bucket)
+	versionSuspended := globalBucketVersioningSys.Suspended(bucket)
 	vid := strings.TrimSpace(r.Form.Get(xhttp.VersionID))
 	if vid != "" && vid != nullVersionID {
 		_, err := uuid.Parse(vid)
@@ -266,6 +267,7 @@ func putOpts(ctx context.Context, r *http.Request, bucket, object string, metada
 			UserDefined:          metadata,
 			VersionID:            vid,
 			Versioned:            versioned,
+			VersionSuspended:     versionSuspended,
 			MTime:                mtime,
 		}, nil
 	}
@@ -273,6 +275,7 @@ func putOpts(ctx context.Context, r *http.Request, bucket, object string, metada
 		opts, err = getOpts(ctx, r, bucket, object)
 		opts.VersionID = vid
 		opts.Versioned = versioned
+		opts.VersionSuspended = versionSuspended
 		opts.UserDefined = metadata
 		return
 	}
@@ -290,6 +293,7 @@ func putOpts(ctx context.Context, r *http.Request, bucket, object string, metada
 			UserDefined:          metadata,
 			VersionID:            vid,
 			Versioned:            versioned,
+			VersionSuspended:     versionSuspended,
 			MTime:                mtime,
 		}, nil
 	}
@@ -300,6 +304,7 @@ func putOpts(ctx context.Context, r *http.Request, bucket, object string, metada
 	}
 	opts.VersionID = vid
 	opts.Versioned = versioned
+	opts.VersionSuspended = versionSuspended
 	opts.MTime = mtime
 	return opts, nil
 }