Dockerfile.rocm.ubi: force using V1 engine (opendatahub-io#244)

V0 engine on `v0.9.1` has some pretty bad accuracy regressions which are solved when forcing using the V1 engine.

https://issues.redhat.com/browse/AIPCC-3159

Author: dtrifiro

Dockerfile.rocm.ubi

@@ -129,6 +129,7 @@ ENV HF_HUB_OFFLINE=1 \
     TOKENIZERS_PARALLELISM=false  \
     RAY_EXPERIMENTAL_NOSET_ROCR_VISIBLE_DEVICES=1 \
     VLLM_USE_TRITON_FLASH_ATTN=0 \
+    VLLM_USE_V1=1 \
     HIP_FORCE_DEV_KERNARG=1 \
     OUTLINES_CACHE_DIR=/tmp/outlines \
     NUMBA_CACHE_DIR=/tmp/numba \