Allow ImageMagic to resize all image types supported by Design Management on Sidekiq servers
### Problem https://gitlab.com/gitlab-org/gitlab/-/merge_requests/22860 introduced the ability for design images to be resized. When enabling the `design_management_resize_images` feature flag on staging: - `gif`, `bmp`, `ico`, and `png` files are processed without error - `jpg` and `tiff` images produce the following error in [Sentry](https://sentry.gitlab.net/gitlab/staginggitlabcom/issues/1348897/?query=is:unresolved%20NewVersionWorker): ``` Failed to manipulate with MiniMagick, maybe it is not an image? Original Error: `gm identify /tmp/mini_magick20200223-16295-1vw9peo` failed with error: gm identify: No decode delegate for this image format (/tmp/mini_magick20200223-16295-1vw9peo). gm identify: Request did not return an image. ``` ### Proposal Allow the ImageMagick library on our Sidekiq servers to process all files that are supported by design management (besides `image/svg+xml`!): - `image/png` - `image/jpeg` - `image/bmp` - `image/gif` - `image/tiff` - `image/ico` The above [Sentry error](https://sentry.gitlab.net/gitlab/staginggitlabcom/issues/1348897/?query=is:unresolved%20NewVersionWorker) suggests the issue happens when running the command `gm identify <path/to/image>`. `gm identify` is part of [`GraphicsMagick` library](http://www.graphicsmagick.org/identify.html). ### References - [Sentry error](https://sentry.gitlab.net/gitlab/staginggitlabcom/issues/1348897/?query=is:unresolved%20NewVersionWorker) - https://gitlab.com/gitlab-org/gitlab/-/merge_requests/22860
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