[train/release] Fix horovod user test master app config (#24734)

release/ml_user_tests/horovod/app_config_master.yaml

@@ -0,0 +1,18 @@
+base_image: "anyscale/ray-ml:nightly-py37-gpu"
+env_vars: {}
+debian_packages:
+  - curl
+
+python:
+  pip_packages:
+    - pytest
+    - awscli
+  conda_packages: []
+
+post_build_cmds:
+  - pip3 uninstall ray -y || true
+  - pip3 install -U {{ env["RAY_WHEELS"] | default("ray") }}
+  - pip3 install 'ray[tune]'
+  - pip3 install torch torchvision
+  - HOROVOD_WITH_GLOO=1 HOROVOD_WITHOUT_MPI=1 HOROVOD_WITHOUT_TENSORFLOW=1 HOROVOD_WITHOUT_MXNET=1 HOROVOD_WITH_PYTORCH=1 pip3 install -U git+https://github.com/horovod/horovod.git
+  - {{ env["RAY_WHEELS_SANITY_CHECK"] | default("echo No Ray wheels sanity check") }}

release/release_tests.yaml

@@ -593,7 +593,7 @@
   team: ml
 
   cluster:
-    cluster_env: ../horovod_tests/app_config_master.yaml
+    cluster_env: horovod/app_config_master.yaml
     cluster_compute: horovod/compute_tpl.yaml
 
   driver_setup: horovod/driver_setup_master.sh