update deps (#1663) [skip ci]

* update deps and tweak logic so axolotl is pip installable

* use vcs url format

* using dependency_links isn't supported per docs)

.github/workflows/tests.yml

@@ -84,6 +84,11 @@ jobs:
             python_version: "3.11"
             pytorch: 2.2.2
             num_gpus: 1
+          - cuda: 121
+            cuda_version: 12.1.0
+            python_version: "3.11"
+            pytorch: 2.3.0
+            num_gpus: 1
     steps:
       - name: Checkout
         uses: actions/checkout@v4