fix(symfony): filter nested constraint groups in Sequentially/Compound

[soyuka]

Summary

Fixes #7777.

ValidatorPropertyMetadataFactory::getPropertyConstraints() expanded Composite::getNestedConstraints() for Sequentially/Compound without filtering by the active validation group. Because Symfony's Composite constructor merges nested groups into the parent (union), a parent in Default could carry a nested constraint that only lives in another group.

Reporter case:

#[Assert\Sequentially([
    new Assert\NotBlank(groups: ['some group']),
    new Assert\Range(min: '0.01'),
])]
private ?string \$someField = null;

Sequentially.groups becomes ['some group', 'Default'] (union from nested). For Default validation, findConstraints('Default') returned Sequentially, then we yielded every nested constraint — including the NotBlank that only belongs to 'some group' — and isRequired() flagged the field as required in the OpenAPI schema.

The fix filters each nested constraint by \in_array(\$validationGroup, \$nestedConstraint->groups, true). Symfony's Constraint::addImplicitGroupName() already propagates the class default group only to constraints already in Default, so explicit non-Default nested groups remain excluded — semantics match validator runtime behavior.

Test plan

• New fixture DummySequentiallyValidatedEntityWithNestedGroups reproduces the reporter's constraint shape.
• New unit test testSequentiallyConstraintDoesNotMarkRequiredFromNestedConstraintWithDifferentGroup fails before the fix (required=true), passes after (required=false).
• Existing testCreateWithSequentiallyConstraint and testCreateWithCompoundConstraint still pass — restriction extraction is unaffected for groupless nested constraints.
• Full src/Symfony/Tests/Validator/ suite green.