[trainer / deepspeed] fix hyperparameter_search (#16740)

* [trainer / deepspeed] fix hyperparameter_search

* require optuna

* style

* oops

* add dep in the right place

* create deepspeed-testing dep group

* Trigger CI

.github/workflows/self-push.yml

@@ -384,7 +384,7 @@ jobs:
         run: |
           apt -y update && apt install -y libaio-dev
           pip install --upgrade pip
-          pip install .[testing,deepspeed]
+          pip install .[deepspeed-testing]
 
       - name: Are GPUs recognized by our DL frameworks
         run: |