treewide: add aliases for third_party dependencies

With bzlmod it is currently not possible to access other third_party libraries. By adding an alias inside the root module we can work around this with a fairly moderate hack. We do have a folder and BUILD file for every dependency anyway, so this isn't that bad.

Change-Id: I472194f590fd4c4aa8ba304af70dd8b92ecc5c1e
Reviewed-on: https://review.monogon.dev/c/monogon/+/3231
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/third_party/go/patches/libseccomp.patch b/third_party/go/patches/libseccomp.patch
index 27de7d5..6779c5d 100644
--- a/third_party/go/patches/libseccomp.patch
+++ b/third_party/go/patches/libseccomp.patch
@@ -5,7 +5,7 @@
          "seccomp_internal.go",
      ],
 +    cdeps = [
-+        "@seccomp",
++        "@@//third_party/seccomp",
 +    ],
      cgo = True,
      importpath = "github.com/seccomp/libseccomp-golang",