Support for 8.5 is declared but there are many (noisy) deprecations

This PR https://github.com/mongodb/mongo-php-library/pull/1758 has been merged into `v2.x` and fixes a number of deprecations on 8.5

Is it possible we could have a patch or minor release to address the non-canonical casts considering this library already supports PHP 8.5 implicitly via `require php ^8.1`?