Integrate gitlab-ci/extend_board_support and 2 more

Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/f05f93329b10c3e0e4dfca98d0e198aad816795a

[BOARD SUPPORT] Include config file in main yaml

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Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/f17baa5a3b6ac9093c77001ba9bf4da652238234

[RELEASE] Remove changelog for description

• The description shall be filled by the Release Notes file

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Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/22a1b0f3ff7ec8630cd04695b5a7f708180ff343

[BOARD SUPPORT] Include C12, C26 and C43 boards