feat: bake HYDRA_LAUNCHER=fork into AMD container environment

Author: sbryngelson

.github/Dockerfile

@@ -72,6 +72,7 @@ RUN if [ "$TARGET" = "amd" ] && [ -n "$AFAR_VERSION" ]; then \
 
 ENV OMPI_ALLOW_RUN_AS_ROOT=1
 ENV OMPI_ALLOW_RUN_AS_ROOT_CONFIRM=1
+ENV HYDRA_LAUNCHER=fork
 ENV PATH="/opt/MFC:$PATH"
 
 COPY ../ /opt/MFC