retry test_big_query_legacy_sql

[liferoad]

Addresses #30513 and #29617

Simply retry this test for now.

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[tvalentyn]

PTAL: #29617 (comment)

If the problem is in the wheel, a retry also won't fix it - we'd have to rebuild the wheel.

[liferoad]

PTAL: #29617 (comment)

If the problem is in the wheel, a retry also won't fix it - we'd have to rebuild the wheel.

I suggest we can retry this for now to check whether it can reduce the flaky rate.

[github-actions]

Reminder, please take a look at this pr: @riteshghorse @damondouglas

[damondouglas]

I'm seeing this lint error: https://ge.apache.org/s/okz5qrmc7tpys/console-log/task/:sdks:python:test-suites:tox:pycommon:lint?page=1#L41

[liferoad]

I'm seeing this lint error: https://ge.apache.org/s/okz5qrmc7tpys/console-log/task/:sdks:python:test-suites:tox:pycommon:lint?page=1#L41

Fixed.

[damondouglas]

LGTM. Thank you @liferoad