Add rustc/cargo version check

ci/test-stable-perf.sh

@@ -2,11 +2,17 @@
 
 cd "$(dirname "$0")/.."
 
-./fetch-perf-libs.sh
+if ! ci/version-check.sh stable; then
+  # This job doesn't run within a container, try once to upgrade tooling on a
+  # version check failure
+  rustup install stable
+  ci/version-check.sh stable
+fi
+export RUST_BACKTRACE=1
 
+./fetch-perf-libs.sh
 export LD_LIBRARY_PATH=$PWD:/usr/local/cuda/lib64
 export PATH=$PATH:/usr/local/cuda/bin
-export RUST_BACKTRACE=1
 
 _() {
   echo "--- $*"