chore(3p/sources): bump channels & overlays (2024-09-01)

Included changes:

* users/aspen: explicitly use open-source nvidia driver

  This now has to be specified explicitly, otherwise evaluation fails with an
  error.
* users/aspen: nixfmt -> nixfmt-classic
* users/aspen: fixes for renamed packages & options
* users/tazjin: fixes for renamed packages & options
* 3p/overlays: remove cbtemulator patch (merged upstream)
* tvix/shell: remove unnecessary patches (merged upstream)
* 3p/rust-crates: mark libgit2_sys as broken
* users/Profpatsch: mark git-db as broken
* 3p/overlays: pick `mypaint` from stable channel
* tvix: fix comments that clippy doesn't like anymore
* tvix/glue: disable a misfiring clippy lint (applying its suggestion breaks
  code below)

Change-Id: I6d3fc027694bbe7425a2d25dc53d65467a44f3b0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12403
Tested-by: BuildkiteCI
Reviewed-by: aspen <root@gws.fyi>
Reviewed-by: Profpatsch <mail@profpatsch.de>
Autosubmit: tazjin <tazjin@tvl.su>

third_party/rust-crates/default.nix

@@ -321,6 +321,7 @@ depot.nix.readTree.drvTargets rec{
       pkg-config
     ];
     env.LIBGIT2_NO_VENDOR = "1";
+    meta.broken = true; # TODO(profpatsch): fix git version mismatch
   };
 
   matches = buildRustCrate {
@@ -417,5 +418,6 @@ depot.nix.readTree.drvTargets rec{
       log
       url
     ];
+    meta.broken = true; # TODO(Profpatsch): see libgit2-sys
   };
 }