Add rust duplicate account test program (#7897)

automerge

programs/bpf/rust/dup_accounts/Cargo.toml

@@ -0,0 +1,26 @@
+
+# Note: This crate must be built using do.sh
+
+[package]
+name = "solana-bpf-rust-dup-accounts"
+version = "0.23.0"
+description = "Solana BPF test program written in Rust"
+authors = ["Solana Maintainers <maintainers@solana.com>"]
+repository = "https://github.com/solana-labs/solana"
+license = "Apache-2.0"
+homepage = "https://solana.com/"
+edition = "2018"
+
+[dependencies]
+solana-sdk = { path = "../../../../sdk/", version = "0.23.0", default-features = false }
+
+[dev_dependencies]
+solana-sdk-bpf-test = { path = "../../../../sdk/bpf/rust/test", version = "0.23.0" }
+
+[features]
+program = ["solana-sdk/program"]
+default = ["program"]
+
+[lib]
+name = "solana_bpf_rust_dup_accounts"
+crate-type = ["cdylib"]