Generate keypair file for c program deployment (#15080)

* Generate keypair file for c program deployment

* Build and use solana-keygen in test-stable-perf

ci/test-stable.sh

@@ -39,6 +39,10 @@ test-stable)
   _ "$cargo" stable test --jobs "$NPROC" --all --exclude solana-local-cluster ${V:+--verbose} -- --nocapture
   ;;
 test-stable-perf)
+  # solana-keygen required when building C programs
+  _ "$cargo" build --manifest-path=keygen/Cargo.toml
+  export PATH="$PWD/target/debug":$PATH
+
   # BPF solana-sdk legacy compile test
   ./cargo-build-bpf --manifest-path sdk/Cargo.toml