Add tests to AMD CI for MI35x (#9662)

Co-authored-by: Sai Enduri <saimanas.enduri@amd.com>

scripts/ci/amd_ci_exec.sh

@@ -1,6 +1,18 @@
 #!/bin/bash
 set -euo pipefail
 
+# Detect GPU family from hostname (e.g., linux-mi35x-gpu-1-xxxxx-runner-zzzzz)
+HOSTNAME_VALUE=$(hostname)
+GPU_FAMILY=""
+
+# Host names look like: linux-mi35x-gpu-1-xxxxx-runner-zzzzz
+if [[ "${HOSTNAME_VALUE}" =~ ^linux-(mi[0-9]+[a-z]*)-gpu-[0-9]+ ]]; then
+  GPU_FAMILY="${BASH_REMATCH[1]}"
+  echo "Detected GPU family from hostname: ${GPU_FAMILY}"
+else
+  echo "Warning: could not parse GPU family from '${HOSTNAME_VALUE}'"
+fi
+
 WORKDIR="/sglang-checkout/test/srt"
 declare -A ENV_MAP=(
   [SGLANG_AMD_CI]=1
@@ -8,6 +20,11 @@ declare -A ENV_MAP=(
   [SGLANG_USE_AITER]=1
 )
 
+# Conditionally add GPU_ARCHS only for mi35x
+if [[ "${GPU_FAMILY}" == "mi35x" ]]; then
+  ENV_MAP[GPU_ARCHS]="gfx950"
+fi
+
 # Parse -w/--workdir and -e ENV=VAL
 while [[ $# -gt 0 ]]; do
   case "$1" in