fix(api): add quota allowance to clickhouse errors

[cvxluo]

In getsentry/sentry#96151 (comment), we saw a small issue where for the max byte scanning policies, we didn't return a quota_allowance in the API response since we were overwriting the original error. This manually puts the quota_allowance back on.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
2529	1	2528	11

View the top 1 failed test(s) by shortest run time

tests.test_snql_api.TestSnQLApi::test_allocation_policy_max_bytes_to_read

Stack Traces | 0.401s run time

Traceback (most recent call last):
  File "/.venv/lib/python3.11........./site-packages/_pytest/runner.py", line 341, in from_call
    result: TResult | None = func()
                             ^^^^^^
  File "/.venv/lib/python3.11........./site-packages/_pytest/runner.py", line 242, in <lambda>
    lambda: runtest_hook(item=item, **kwds), when=when, reraise=reraise
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/.venv/lib/python3.11....../site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/.venv/lib/python3.11....../site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/.venv/lib/python3.11.........................../site-packages/pluggy/_callers.py", line 182, in _multicall
    return outcome.get_result()
           ^^^^^^^^^^^^^^^^^^^^
  File "/.venv/lib/python3.11.../site-packages/pluggy/_result.py", line 100, in get_result
    raise exc.with_traceback(exc.__traceback__)
  File "/.venv/lib/python3.11.........................../site-packages/pluggy/_callers.py", line 167, in _multicall
    teardown.throw(outcome._exception)
  File "/.venv/lib/python3.11....../site-packages/_pytest/threadexception.py", line 92, in pytest_runtest_call
    yield from thread_exception_runtest_hook()
  File "/.venv/lib/python3.11....../site-packages/_pytest/threadexception.py", line 68, in thread_exception_runtest_hook
    yield
  File "/.venv/lib/python3.11.........................../site-packages/pluggy/_callers.py", line 167, in _multicall
    teardown.throw(outcome._exception)
  File "/.venv/lib/python3.11....../site-packages/_pytest/unraisableexception.py", line 95, in pytest_runtest_call
    yield from unraisable_exception_runtest_hook()
  File "/.venv/lib/python3.11....../site-packages/_pytest/unraisableexception.py", line 70, in unraisable_exception_runtest_hook
    yield
  File "/.venv/lib/python3.11.........................../site-packages/pluggy/_callers.py", line 167, in _multicall
    teardown.throw(outcome._exception)
  File "/.venv/lib/python3.11....../site-packages/_pytest/logging.py", line 846, in pytest_runtest_call
    yield from self._runtest_for(item, "call")
  File "/.venv/lib/python3.11....../site-packages/_pytest/logging.py", line 829, in _runtest_for
    yield
  File "/.venv/lib/python3.11.........................../site-packages/pluggy/_callers.py", line 167, in _multicall
    teardown.throw(outcome._exception)
  File "/.venv/lib/python3.11.../site-packages/_pytest/capture.py", line 880, in pytest_runtest_call
    return (yield)
            ^^^^^
  File "/.venv/lib/python3.11.........................../site-packages/pluggy/_callers.py", line 167, in _multicall
    teardown.throw(outcome._exception)
  File "/.venv/lib/python3.11.../site-packages/_pytest/skipping.py", line 257, in pytest_runtest_call
    return (yield)
            ^^^^^
  File "/.venv/lib/python3.11.........................../site-packages/pluggy/_callers.py", line 103, in _multicall
    res = hook_impl.function(*args)
          ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/.venv/lib/python3.11........./site-packages/_pytest/runner.py", line 174, in pytest_runtest_call
    item.runtest()
  File "/.venv/lib/python3.11....../site-packages/_pytest/python.py", line 1627, in runtest
    self.ihook.pytest_pyfunc_call(pyfuncitem=self)
  File "/.venv/lib/python3.11....../site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/.venv/lib/python3.11....../site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/.venv/lib/python3.11.........................../site-packages/pluggy/_callers.py", line 139, in _multicall
    raise exception.with_traceback(exception.__traceback__)
  File "/.venv/lib/python3.11.........................../site-packages/pluggy/_callers.py", line 103, in _multicall
    res = hook_impl.function(*args)
          ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/.venv/lib/python3.11....../site-packages/_pytest/python.py", line 159, in pytest_pyfunc_call
    result = testfunction(**testargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../snuba/tests/test_snql_api.py", line 1356, in test_allocation_policy_max_bytes_to_read
    assert response.status_code == 429
AssertionError: assert 500 == 429
 +  where 500 = <WrapperTestResponse streamed [500 INTERNAL SERVER ERROR]>.status_code

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