* Add tests for commit consistency showing wrong behaviour

* Clear scheduled document changes at the end of a commit operation

* Rename private variables to communicate intent

* Remove obsolete comment

* Use different error code

* Use single mongos in consistency tests

This ensures that the fail points are created on the same server that the write operations take place on, which can't be guaranteed in a sharded cluster with multiple mongoses.

* Rename test methods for clarity

* Explain reasoning for index error

* Extract helper method to create failpoint

* Add configuration setting for transactional flush

* Use classic setters for transactional flush setting

* Extract commit logic

* Support transactional commit operations

* Always use transactional flush if supported

With this commit, all tests using the document manager use transactional flush as long as transactions are supported. Certain tests can use the static $allowsTransactions variable to disable this behaviour.

* Test with MongoDB 7.0

* Update test names

* Update phpstan baseline

* Fix query selection in shard key tests

* Flip transaction options constant by default

* Use supportsTransaction method when skipping tests

* Apply review feedback to tests

* Add separate test to check write concern in commit options

* Strip write options when in transaction

* Use majority write concern in test

* Pass session and transaction information to event args

* Only dispatch lifecycle events once per commit operation

* Remove isInTransaction property in event args

* Split method signature for readability

* Use property promotion for event args classes

* Extract construction of eventArgs

* Inline spl_object_hash calls

* Avoid injecting test instance

* Add session to commitOptions in persister

* Add session assertions in LifecycleEventManager

* Only retry transaction once

* Rename variable

* Remove references to transactions where not applicable

* Update transaction documentation

* Apply suggestions from code review

Co-authored-by: Jeremy Mikola <jmikola@gmail.com>

* Change title level in event documentation

* Add documentation about transactions to event docs

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Co-authored-by: Jeremy Mikola <jmikola@gmail.com>