Slowest 20 targets

//src/test/shell/bazel:bazel_bootstrap_distfile_test on macOS (shard 1): PASSED in 1978.1s (log)
//src/test/shell/bazel:bazel_bootstrap_distfile_test on Ubuntu 22.04 LTS: PASSED in 1168.7s (log)
//src/test/shell/bazel:bazel_bootstrap_distfile_tar_test on Ubuntu 22.04 LTS: PASSED in 1148.2s (log)
//src/test/shell/bazel/remote:remote_execution_http_test on CentOS 7: FLAKY in 1 out of 2 runs in 1122.0s (900.8s + 221.2s) (log)
//src/test/shell/bazel:bazel_determinism_test on Ubuntu 22.04 LTS: PASSED in 1060.0s (log)
//src/test/shell/bazel:bazel_bootstrap_distfile_test on CentOS 7: PASSED in 1053.2s (log)
//src/test/shell/bazel:bazel_determinism_test on CentOS 7: PASSED in 1031.2s (log)
//src/test/shell/bazel/remote:remote_execution_http_test on RBE on Ubuntu 20.04 LTS: FLAKY in 1 out of 2 runs in 954.1s (900.7s + 53.4s) (log)
//src/test/shell/bazel:bazel_java_test_jdk17_toolchain_head (shard 2/2) on CentOS 7: PASSED in 904.4s (log)
//src/test/shell/bazel:bazel_java_test_jdk21_toolchain_head (shard 2/2) on Ubuntu 22.04 LTS: PASSED in 903.9s (log)
//src/test/py/bazel:bazel_windows_test on Windows: FLAKY in 2 out of 3 runs in 881.5s (300.0s + 300.0s + 281.4s) (log)
//src/test/shell/bazel:bazel_java_test_jdk11_toolchain_head (shard 1/2) on CentOS 7: PASSED in 879.9s (log)
//src/test/shell/bazel:bazel_java_test_jdk11_toolchain_head (shard 2/2) on CentOS 7: PASSED in 878.2s (log)
//src/test/shell/bazel:bazel_java_test_jdk17_toolchain_head (shard 1/2) on CentOS 7: PASSED in 868.5s (log)
//src/test/shell/bazel:bazel_java_test_jdk21_toolchain_head (shard 1/2) on Ubuntu 22.04 LTS: PASSED in 843.7s (log)
//src/test/shell/bazel:bazel_bootstrap_distfile_test on Windows: PASSED in 832.8s (log)
//src/test/shell/bazel:bazel_java_test_jdk17_toolchain_head (shard 2/2) on Ubuntu 22.04 LTS: PASSED in 828.8s (log)
//src/test/py/bazel:bazel_windows_cpp_test on Windows: PASSED in 729.1s (log)
//src/test/shell/bazel:bazel_java_test_jdk17_toolchain_head (shard 1/2) on Ubuntu 22.04 LTS: PASSED in 728.9s (log)
//src/test/shell/bazel:bazel_bootstrap_distfile_tar_test on Ubuntu 20.04 LTS: PASSED in 710.9s (log)

Bazel

Parallelize copying of large tree artifacts out of the sandbox.

Buildkite had a problem