Investigate Redundant `@com_google_benchmark//:benchmark` Dependency in Bazel Builds

[jinseopkim0]

Pull request #15543 fixed build failures in several benchmark targets on the macOS Bazel CI. The builds were failing because they were missing a direct dependency on @com_google_benchmark//:benchmark, even though they already depended on @com_google_benchmark//:benchmark_main.

While adding the explicit dependency resolves the build errors, it's not clear why this is necessary. According to the google/benchmark BUILD.bazel file, the :benchmark_main target depends on :benchmark and should export the necessary headers and symbols.

This issue affects the macOS Bazel CI builds.

This issue is to track the investigation into the root cause of this behavior:

1. Why is a direct dependency on @com_google_benchmark//:benchmark required when a dependency on @com_google_benchmark//:benchmark_main already exists?
2. Why does this issue appear to be specific to the macOS Bazel CI build environment?
3. Is there a more fundamental issue in how dependencies are being resolved or in the toolchain configuration?

Acceptance Criteria:

• Understand and document the reason for the seemingly redundant dependency.
• Determine if a configuration change can remove the need for the explicit dependency on @com_google_benchmark//:benchmark in the benchmark targets.

Reference:

• PR #15543: fix(bazel): Add missing dependency to benchmark targets