better rust build/test (#2223)

.github/workflows/test_bindings.yml

diff --git a/.github/workflows/test_bindings.yml b/.github/workflows/test_bindings.yml
index e8639f2..eea13b7 100644
--- a/.github/workflows/test_bindings.yml
+++ b/.github/workflows/test_bindings.yml
@@ -54,7 +54,8 @@
       - name: Run Rust tests natively via Cargo
         run: cargo test
         working-directory: bindings/rust
-      - name: Run Rust tests via CMake target
+      - name: Run Rust tests via CMake
         run: |
           cmake -S . -B build -DBENCHMARK_ENABLE_RUST_BINDINGS=ON -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON
-          cmake --build build --target test_rust_bindings
+          cmake --build build
+          cd build && ctest -R rust_bindings_tests

test/CMakeLists.txt

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 588b463..280113c 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -329,9 +329,13 @@
 
 if (BENCHMARK_ENABLE_RUST_BINDINGS)
   find_program(CARGO_EXECUTABLE cargo REQUIRED)
-  add_custom_target(test_rust_bindings ALL
+  add_custom_target(build_rust_bindings ALL
+    COMMAND ${CARGO_EXECUTABLE} build --tests
+    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/bindings/rust
+    COMMENT "Building Rust bindings and tests"
+  )
+  add_test(NAME rust_bindings_tests
     COMMAND ${CARGO_EXECUTABLE} test
     WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/bindings/rust
-    COMMENT "Running Rust bindings tests"
   )
 endif()