Disable the S3 backup test

Dependencies

• [2] GLHKDGJ4 hydra: revert 24180
• [3] UGA45FNC Add a plugin for backing up builds in s3
• [4] 3MDDGGSN * Install the manual.
• [5] QK2OXCKP hydra/release.nix: move manual to tarball build, restore version in store path for tarball build
• [6] YQWH4POV * Simplify.
• [*] T4LLYESZ * Nix expression for building Hydra.

Change contents

• replacement in release.nix at line 157
  [2.54]→[4.2994:3040](∅→∅),[4.2994]→[4.2994:3040](∅→∅)
  − --set NIX_RELEASE ${nix.name}
  [2.54]

  [4.3040]
  + --set NIX_RELEASE ${nix.name or "unknown"}
• edit in release.nix at line 210
  [3.63]

  [3.63]
  + /*
• edit in release.nix at line 249
  [3.1705]

  [4.3482]
  + */