Symfony version(s) affected: 5.1.0

Description
@jmikola has raised concerns with our handling of both the database path and collection query string in a MongoDbStore constructed with a MongoDB connection URI. Please see #37140 (comment)

How to reproduce
Construction of a MongoDbStore using a MongoDB connection URI with collection= in the querystring.

Possible Solution
We should remove collection from the query string before passing the URI to the driver.

Additional context
#37140 (comment)

See the note regarding libmongoc client and connection re-use internally: https://www.php.net/manual/en/mongodb.connection-handling.php