Update stubs for ext-mongodb 1.16

[alcaeus]

This PR updates the stubs for the MongoDB extension.

This PR updates the function map to include method signatures for ext-mongodb 1.16.

Notable changes:

• Added MongoDB\BSON\Document, MongoDB\BSON\Iterator, and MongoDB\BSON\PackedArray classes
• Made constructor for MongoDB\BSON\Int64 public
• Added MongoDB\Driver\WriteResult::getErrorReplies
• Added missing stubs in for MongoDB\Driver\ClientEncryption

[alcaeus]

Note: test failures are unrelated to the changes from this PR.

[GromNaN]

@alcaeus There are missing updates from 1.15. At least MongoDB\BSON\Binary::__constructor() 2nd argument is optional since mongodb/mongo-php-driver#1362

[alcaeus]

Updated stubs to represent typing changes. The last commit also adds all SDAM monitoring classes and some other stubs that where previously missed.

[isfedorov]

@alcaeus Thank you!