SOLANA_CUDA=1 works again (#5968)

* SOLANA_CUDA=1 works again

* Minor comment reformat

* Set SOLANA_CUDA=1 explictly

ci/test-stable.sh

@@ -74,6 +74,7 @@ test-stable-perf)
     # shellcheck source=/dev/null
     source ./target/perf-libs/env.sh
     ROOT_FEATURES=cuda
+    export SOLANA_CUDA=1
   fi
 
   # Run root package library tests
@@ -91,11 +92,9 @@ test-local-cluster)
   ;;
 esac
 
-# Assumes target/debug is populated. Ensure last build command
-# leaves target/debug in the state intended for localnet-sanity
 echo --- ci/localnet-sanity.sh
+export CARGO_TOOLCHAIN=+"$rust_stable"
 (
   set -x
-  export PATH=$PWD/target/debug:$PATH
-  USE_INSTALL=1 ci/localnet-sanity.sh -x
+  ci/localnet-sanity.sh -x
 )

multinode-demo/common.sh

@@ -55,8 +55,8 @@ else
     if [[ -n $NDEBUG ]]; then
       maybe_release=--release
     fi
-    declare manifest_path="--manifest-path=$SOLANA_ROOT/Cargo.toml"
-    printf "cargo run $manifest_path $maybe_release $maybe_package --bin %s %s -- " "$program" "$features"
+    declare manifest_path="--manifest-path=$SOLANA_ROOT/$crate/Cargo.toml"
+    printf "cargo $CARGO_TOOLCHAIN run $manifest_path $maybe_release $maybe_package --bin %s %s -- " "$program" "$features"
   }
 fi