[golang/go] build: build failure on go1.26-linux-arm64_c4as16-perf_vs_release

### ROOT CAUSE The issue arises from the build being throttled due to high system load on the builder machine ("go1.26-linux-arm64_c4as16-perf_vs_release"). The log indicates that the load average remains above the threshold (0.20) for an extended period, causing the build to wait indefinitely or fail. This is likely due to the builder machine being overloaded, which is outside the control of the Go project's codebase. ### CODE FIX This issue is not directly fixable in the Go codebase, as it pertains to the CI infrastructure and load management of the builder machine. However, to address the problem in the CI system: 1. **Increase the load threshold** in the CI configuration for the specific builder machine to allow higher load averages. 2. **Monitor and optimize** the CI jobs to reduce resource consumption, ensuring builds are scheduled on machines with lower load. 3. **Investigate and resolve** any flaky tests or long-running tasks that might be contributing to the high load. Since the issue is in the CI system (not the Go code), no code changes are required for the Go project. Contact the CI infrastructure team for adjustments.