Issue #3113403 by Beakerboy, daffie: Make Drupal\Core\Database\Query\Condition driver overridable

core/lib/Drupal/Core/Database/Connection.php

core/lib/Drupal/Core/Database/Driver/mysql/Condition.php

core/lib/Drupal/Core/Database/Driver/mysql/Schema.php

core/lib/Drupal/Core/Database/Driver/pgsql/Condition.php

core/lib/Drupal/Core/Database/Driver/sqlite/Condition.php

core/lib/Drupal/Core/Database/Query/Condition.php

core/lib/Drupal/Core/Database/Query/Delete.php

core/lib/Drupal/Core/Database/Query/Merge.php

core/lib/Drupal/Core/Database/Query/QueryConditionTrait.php

core/lib/Drupal/Core/Database/Query/Select.php

core/lib/Drupal/Core/Database/Query/SelectExtender.php

core/lib/Drupal/Core/Database/Query/Update.php

core/lib/Drupal/Core/Database/Schema.php

...tests/Drupal/KernelTests/Core/Database/ConnectionTest.php

...s/Drupal/KernelTests/Core/Database/DeleteTruncateTest.php

core/tests/Drupal/KernelTests/Core/Database/MergeTest.php

core/tests/Drupal/KernelTests/Core/Database/SelectTest.php

core/tests/Drupal/KernelTests/Core/Database/UpdateTest.php

core/tests/Drupal/Tests/Core/Database/OrderByTest.php