chore(IDX): group rust benchmark arguments (#3959)

This moves all necessary arguments for running benchmarks into
`rust-benchmarks.sh`. This reduces complexity in the workflow file and
ensures `rust-benchmarks.sh` can be run without having to set any
environment variables.

.github/workflows/schedule-rust-bench.yml

@@ -42,10 +42,8 @@ jobs:
         id: rust-benchmarks
         shell: bash
         run: |
-          ./ci/scripts/rust-benchmarks.sh
+          BAZEL_CI_CONFIG="--config=ci" ./ci/scripts/rust-benchmarks.sh
         env:
-          BAZEL_CI_CONFIG: "--config=ci"
-          BAZEL_COMMAND: "run"
           CI_JOB_URL: "${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
           RUST_BACKTRACE: "full"
           TARGETS: ${{ matrix.targets }}

ci/scripts/rust-benchmarks.sh

@@ -3,8 +3,7 @@ set -eEuo pipefail
 
 TARGET_LIST=$(bazel query "attr(tags, 'rust_bench', ${TARGETS:-'//rs/...'})")
 for TARGET in $TARGET_LIST; do
-    export BAZEL_TARGETS="$TARGET"
-    time ./ci/bazel-scripts/main.sh
+    BAZEL_COMMAND=run BAZEL_TARGETS="$TARGET" time ./ci/bazel-scripts/main.sh
 done
 find -L ./bazel-out -name 'benchmark.json'