integration-tests: Add workaround for 9p corruption

integration-tests/default.nix

···
       {
         hostPkgs = pkgs;
         _module.args.flake = flake;
+
+        extraBaseModules = {
+          # Temporary workaround for <https://github.com/zhaofengli/colmena/issues/281>
+          # References:
+          # - LKML discussion: <https://lore.kernel.org/all/w5ap2zcsatkx4dmakrkjmaexwh3mnmgc5vhavb2miaj6grrzat@7kzr5vlsrmh5/>
+          # - Lix discussion: <https://matrix.to/#/!lymvtcwDJ7ZA9Npq:lix.systems/$wLqRlm7-iNmrkN2Tcn--Tmi92id4wgvKC5APwiEYYgw?via=lix.systems&via=matrix.org>
+          # - Proposed fix: <https://lkml.org/lkml/2024/10/21/1621>
+          boot.kernelPackages = pkgs.linuxPackages_6_6;
+        };
       }
     ];
     result = config.test;