fix: expand default delay, tests have more time to succeed

Failed in 2h 56m
:mac: macOScurl -sS https://raw.githubusercontent.com/bazelbuild/continuous-integration/master/buildkite/bazelci.py?1736817173 -o bazelci.py && python3 bazelci.py runner --task=macos
Waited 11s
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Ran in 1h 26m
:mac: macOScurl -sS https://raw.githubusercontent.com/bazelbuild/continuous-integration/master/buildkite/bazelci.py?1736817173 -o bazelci.py && python3 bazelci.py runner --task=macos
Waited 10s
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Ran in 1h 29m
:mac: macOScurl -sS https://raw.githubusercontent.com/bazelbuild/continuous-integration/master/buildkite/bazelci.py?1736817173 -o bazelci.py && python3 bazelci.py runner --task=macos_legacy_watcher
Waited 3s
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Ran in 1h 20m
:mac: macOScurl -sS https://raw.githubusercontent.com/bazelbuild/continuous-integration/master/buildkite/bazelci.py?1736817173 -o bazelci.py && python3 bazelci.py runner --task=macos_legacy_watcher
Waited 6s
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Ran in 1h 32m
Total Job Run Time: 6h 15m