### Bug Description Building [this sample `core20` snapcraft.yaml](https://github.com/snapcore/snapcraft/blob/main/tests/spread/general/metadata-links/snapcraft.yaml) from general spread tests, fields such as `issues`, `donation`, `contact`, `source-code`, and `website` are translated to the result's `snap.yaml` under the `links` field. But if I just switch to `base: core22` these links are nowhere to be found in the built snap. ### To Reproduce - Build this snap: https://github.com/snapcore/snapcraft/blob/main/tests/spread/general/metadata-links/snapcraft.yaml - Check `meta/snap.yaml` in the resulting snap and look for `links`. - Edit `snapcraft.yaml` and set `base: core22`. - Rebuild. - Look for any links in `meta/snap.yaml`. ### Environment ```sh $ snap version snap 2.59.5 snapd 2.59.5 series 16 ubuntu 23.04 kernel 6.2.0-23-generic ``` ### snapcraft.yaml ```shell name: metadata-links summary: test metadata links description: | Verify that top level metadata links in snapcraft.yaml are created at a top level links entry in snap.yaml. version: "1.0" grade: stable confinement: strict base: core22 issues: - https://github.com/acme/project/issues - https://bugs.launchpad.net/project/filebug donation: - https://paypal.com - https://cafecito.app/ - https://ko-fi.com/ contact: - mailto:project@acme.com - team@acme.com source-code: https://github.com/acme/project.git website: https://project.acme.org parts: nil: plugin: nil ``` ### Relevant log output ```shell $ sudo mount -t squashfs -o ro metadata-links_1.0_amd64-core20.snap tmp $ grep links: tmp/meta/snap.yaml links: $ sudo umount tmp $ sudo mount -t squashfs -o ro metadata-links_1.0_amd64-core22.snap tmp $ grep links: tmp/meta/snap.yaml $ ``` ### Additional context _No response_