BookOutlineStorage don't use queries

the book module is now in contrib.

fixed test failures of these two test: BookTest, BookUninstallTest, along with phpcs issue

But there is one test failure for following test:
testBookAdminLocalTasks on line no. 21 "'book' => 'modules/custom/book',

This test coverage break on local with similar error s, however update correct path 'book' => 'modules/contrib/book' of this directory on local & it fixed

how we are thinking to fix this as now book is part of contrib module & just wondering why this issue coming not in other MR, why this is replicate here , any thoughts or suggestion