test: introduce some basic benchmarks (#3877)

* test(ironfish-rust): introduce some basic benchmarks

* chore: move benchmarks to a separate project

* test: add additional rust benchmarks: asset, note decryption, sapling key

.cargo/config.toml

@@ -1,6 +1,9 @@
+[alias]
+benchmark = "bench --package benchmarks"
+
 [target.aarch64-unknown-linux-gnu]
 linker = "aarch64-linux-gnu-gcc"
 
 [target.aarch64-unknown-linux-musl]
 linker = "aarch64-linux-musl-gcc"
-rustflags = ["-C", "target-feature=-crt-static"]
+rustflags = ["-C", "target-feature=-crt-static"]

.github/workflows/rust_ci.yml

@@ -1,6 +1,7 @@
 on:
   pull_request:
     paths:
+      - "benchmarks/**"
       - "ironfish-mpc/**"
       - "ironfish-phase2/**"
       - "ironfish-rust/**"
@@ -14,6 +15,7 @@ on:
     branches:
       - master
     paths:
+      - "benchmarks/**"
       - "ironfish-mpc/**"
       - "ironfish-phase2/**"
       - "ironfish-rust/**"
@@ -45,7 +47,7 @@ jobs:
 
       - name: Check that cargo lockfile is up to date
         run: |
-          cargo check --locked
+          cargo check --locked --all-targets
 
       # Note: ironfish-zkp is does not need this due to different licensing
       - name: Check for license headers for ironfish-rust