Fix: adding magistral fsdp config, fixing not eval with test_datasets, handle mllama attention (#2789) [skip ci]

* feat: add fsdp config for magistral

* fix: add mllama self attention handling for lora kernels

* fix: no eval if val_set_size 0 despite having test_datasets

* fix: add note for cce for vlm in newer model

src/axolotl/integrations/cut_cross_entropy/README.md

@@ -24,6 +24,14 @@ pip3 uninstall -y cut-cross-entropy && pip3 install "cut-cross-entropy[transform
 
 ## Usage
 
+**NOTE**: If you are training a VLM model, please use older version of Axolotl as upstream has applied a major VLM refactor, and our patches have not been updated yet.
+
+```bash
+git checkout 787880215b3ab32ccaf81c1b2e9588c6f3e6e764
+
+pip3 install --no-build-isolation -e .
+```
+
 ```yaml
 plugins:
   - axolotl.integrations.cut_cross_entropy.CutCrossEntropyPlugin