🐛(react) change most tertiary buttons to tertiary-text

Since the addition of tertiary-text variant, the original tertiary
variant has seen its background color changing from transparent to
greyscale-100, the change has impacted lots of components making
them look odd. So that's why I updated most of old tertiary to
tertiary-text.

Fixes #223

packages/react/src/components/Forms/FileUploader/FileUploaderMulti.tsx

@@ -39,7 +39,7 @@ export const FileUploaderMulti = forwardRef<
               <div className="c__file-uploader__file__specs">
                 <span>{formatBytes(file.size)}</span>
                 <Button
-                  color="tertiary"
+                  color="tertiary-text"
                   size="nano"
                   aria-label={t(
                     "components.forms.file_uploader.delete_file_name",