Handle caught late cache probe exits

[yoshifuminakamura]

Summary

• treat a late restore probe status file as authoritative even when build.sh catches the build tool exit and returns a different nonzero code
• preserve fallback behavior by rerunning build.sh normally if restore validation still misses
• extend the autotools-style cache test to wrap the final make in an if/exit path like GENESIS Fugaku

Safety

• common cache wrapper/test-only change
• diff scan found no token/secret-like values

Tests

• bash scripts/tests/test_build_cache.sh
• bash scripts/tests/test_build_environment_snapshot.sh
• shellcheck -S error scripts/build_with_cache.sh scripts/build_tool_wrappers/bk_build_tool_wrapper.sh scripts/collect_environment_snapshot.sh scripts/tests/test_build_cache.sh
• bash -n scripts/build_with_cache.sh scripts/build_tool_wrappers/bk_build_tool_wrapper.sh scripts/collect_environment_snapshot.sh scripts/tests/test_build_cache.sh
• /home/nakamura/fugakunext/venv/bin/python -m pytest result_server/tests/test_environment_snapshot_ci_scripts.py