Update ROCm (6.3 linux, 6.2 windows) and CUDA v12.8 (#9304)

* Bump cuda and rocm versions

Update ROCm to linux:6.3 win:6.2 and CUDA v12 to 12.8.
Yum has some silent failure modes, so largely switch to dnf.

* Fix windows build script

scripts/build_docker.sh

@@ -28,7 +28,7 @@ if echo $PLATFORM | grep "amd64" > /dev/null; then
         ${LOAD_OR_PUSH} \
         --platform=linux/amd64 \
         ${OLLAMA_COMMON_BUILD_ARGS} \
-        --target runtime-rocm \
+        --build-arg FLAVOR=rocm \
         -f Dockerfile \
         -t ${FINAL_IMAGE_REPO}:$VERSION-rocm \
         .