Add GetObject gzip option (#14226)

Enabled with `mc admin config set alias/ api gzip_objects=on`

Standard filtering applies (1K response minimum, not compressed content 
type, not range request, gzip accepted by client).

cmd/object-handlers.go

@@ -37,6 +37,7 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/gorilla/mux"
+	"github.com/klauspost/compress/gzhttp"
 	miniogo "github.com/minio/minio-go/v7"
 	"github.com/minio/minio-go/v7/pkg/credentials"
 	"github.com/minio/minio-go/v7/pkg/encrypt"
@@ -568,6 +569,9 @@ func (api objectAPIHandlers) GetObjectHandler(w http.ResponseWriter, r *http.Req
 		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
 		return
 	}
+	if !globalAPIConfig.shouldGzipObjects() {
+		w.Header().Set(gzhttp.HeaderNoCompression, "true")
+	}
 
 	if r.Header.Get(xMinIOExtract) == "true" && strings.Contains(object, archivePattern) {
 		api.getObjectInArchiveFileHandler(ctx, objectAPI, bucket, object, w, r)