Don't crash if we can't rename the paths out of the sandbox

For some reason (probably linked to
https://www.kernel.org/doc/html/latest/filesystems/overlayfs.html?highlight=overlayfs#renaming-directories),
renaming the output paths of a derivation from their sandbox location
(`/nix/store/abc-foo.drv.chroot/nix/store/def-foo`) to their final one
(`/nix/store/def-foo`) fails in some scenarios with `EXDEV` (“invalid
cross-device link”).

Work around that by falling back to copying them in that case, which is
much less efficient, but correct.

Fix NixOS#8395

src/libstore/build/local-derivation-goal.cc

@@ -359,7 +359,7 @@ bool LocalDerivationGoal::cleanupDecideWhetherDiskFull()
             if (buildMode != bmCheck && status.known->isValid()) continue;
             auto p = worker.store.printStorePath(status.known->path);
             if (pathExists(chrootRootDir + p))
-                renameFile((chrootRootDir + p), p);
+                moveFile((chrootRootDir + p), p);
         }
 
     return diskFull;