Use PHPUnit 10

[franmomu]

Closes #2509

Since we are using PHP 8.1, we don't need PHPUnit 9 anymore, I've installed rector locally and replaced annotations with attributes.

[malarzm]

I'm surprised so little had to be done :) One thing that is off though is number of tests executed:

This PR's PHP 8.1, Server 6.0, highest executed 2646 tests
2.6.x's counterpart has 2467 tests

Am i looking correctly that there is a test that got lost somewhere?

[malarzm]

Actually there's a chance that PHPUnit's deprecation was counted towards number of tests:

There was 1 PHPUnit test runner deprecation:

1) Your XML configuration validates against a deprecated schema. Migrate your XML configuration using "--migrate-configuration"!

but that be weird decision from PHPUnit's team

[malarzm]

@franmomu feel free to merge once you decide whether my previous comment makes sense or no :)

[franmomu]

I'm surprised so little had to be done :) One thing that is off though is number of tests executed:

This PR's PHP 8.1, Server 6.0, highest executed 2646 tests 2.6.x's counterpart has 2467 tests

Am i looking correctly that there is a test that got lost somewhere?

Good catch! it was my fault in https://github.com/doctrine/mongodb-odm/pull/2564/files#diff-62b86ab419dbc39877816e5c1f489b8fa4110e14bb395c2ba9f7cd961720ef60L13-L17

    /**
     * @testWith ["groups"]
     *           ["groupsSimple"]
     */

was changed to

    #[TestWith(['groups', 'groupsSimple'])]

instead of

    #[TestWith(['groups'])]
    #[TestWith(['groupsSimple'])]