fix: empty file tags cause upload error for some providers (#7300)

* fix: empty file tags cause upload error for some providers

DigitalOcean and Linode object storage solutions do not accept `tags` option while uploading a file. Previously, tags option was set to default empty object. Now, we do not include it if it is empty.

* chore: add tests for saving a file with/without tags

* chore: update file tags handling to make tests pass

* chore: refactor file tag tests

* chore: update file tag tests

* chore: update changelog

* chore: update changelog entry

* chore: remove duplicated changelog entry

src/Routers/FilesRouter.js

@@ -166,16 +166,22 @@ export class FilesRouter {
         // update fileSize
         const bufferData = Buffer.from(fileObject.file._data, 'base64');
         fileObject.fileSize = Buffer.byteLength(bufferData);
+        // prepare file options
+        const fileOptions = {
+          metadata: fileObject.file._metadata,
+        };
+        // some s3-compatible providers (DigitalOcean, Linode) do not accept tags
+        // so we do not include the tags option if it is empty.
+        const fileTags =
+          Object.keys(fileObject.file._tags).length > 0 ? { tags: fileObject.file._tags } : {};
+        Object.assign(fileOptions, fileTags);
         // save file
         const createFileResult = await filesController.createFile(
           config,
           fileObject.file._name,
           bufferData,
           fileObject.file._source.type,
-          {
-            tags: fileObject.file._tags,
-            metadata: fileObject.file._metadata,
-          }
+          fileOptions
         );
         // update file with new data
         fileObject.file._name = createFileResult.name;