CRM_Queue_Service - Use ?? instead of error-supression operator

[demeritcowboy]

Overview

Similar to #21206

Addresses test fails in #21064:

not ok 2343 - Error: CRM_Queue_Queue_SqlTest::testPriorities with data set #0 (array('Sql', 'test-queue'))
not ok 2344 - Error: CRM_Queue_QueueTest::testBasicUsage with data set #0 (array('Sql', 'test-queue'))
not ok 2345 - Error: CRM_Queue_QueueTest::testBasicUsage with data set #1 (array('Memory', 'test-queue'))
not ok 2346 - Error: CRM_Queue_QueueTest::testManualRelease with data set #0 (array('Sql', 'test-queue'))
not ok 2347 - Error: CRM_Queue_QueueTest::testManualRelease with data set #1 (array('Memory', 'test-queue'))
not ok 2348 - Error: CRM_Queue_QueueTest::testTimeoutRelease with data set #0 (array('Sql', 'test-queue'))
not ok 2349 - Error: CRM_Queue_QueueTest::testTimeoutRelease with data set #1 (array('Memory', 'test-queue'))
not ok 2350 - Error: CRM_Queue_QueueTest::testStealItem with data set #0 (array('Sql', 'test-queue'))
not ok 2351 - Error: CRM_Queue_QueueTest::testStealItem with data set #1 (array('Memory', 'test-queue'))
not ok 2352 - Error: CRM_Queue_QueueTest::testCreateResetTrue with data set #0 (array('Sql', 'test-queue'))
not ok 2353 - Error: CRM_Queue_QueueTest::testCreateResetTrue with data set #1 (array('Memory', 'test-queue'))
not ok 2354 - Error: CRM_Queue_QueueTest::testCreateResetFalse with data set #0 (array('Sql', 'test-queue'))
not ok 2355 - Error: CRM_Queue_QueueTest::testCreateResetFalse with data set #1 (array('Memory', 'test-queue'))
not ok 2356 - Error: CRM_Queue_QueueTest::testLoad with data set #0 (array('Sql', 'test-queue'))
not ok 2357 - Error: CRM_Queue_QueueTest::testLoad with data set #1 (array('Memory', 'test-queue'))
not ok 2358 - Error: CRM_Queue_RunnerTest::testRunAllNormal
not ok 2359 - Error: CRM_Queue_RunnerTest::testRunAll_AddMore
not ok 2360 - Error: CRM_Queue_RunnerTest::testRunAll_Continue_Exception
not ok 2361 - Error: CRM_Queue_RunnerTest::testRunAll_Abort_Exception
not ok 2362 - Error: CRM_Queue_RunnerTest::testRunAll_Abort_False

[civibot]

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[demeritcowboy]

Thanks @colemanw