[6.x] Resolve self/static template args against implementing class before bound check

[alies-dev]

Fixes #11199.

Currently @implements I errors with Extended template param ... type self given, even when the implementing class clearly satisfies the bound. Replacing self with the FQN makes the error go away. Issue #11199 reports the same bound-check failure for trait @use HasCollection.

The cause: ClassLikeAnalyzer::checkTemplateParams passed $extended_type straight from template_extended_params into UnionTypeComparator::isContainedBy without running it through TypeExpander::expandUnion. So self/static survived as a raw TNamedObject and the bound check could not resolve them to the implementing class. Other call sites (Codebase\ClassLikes:1078, Codebase\Methods:750) already use TypeExpander::expandUnion. This fix supplies the current class name, parent class and class finality when expanding template arguments before checking their bounds.

The same code path handles @extends, @template-implements, @template-extends and trait @use, so all of them are covered. Tests exercise self and static across all five annotation forms, nested static in final and non-final classes, and nested self in a final class. Two negative cases expect InvalidTemplateParam for bound-violating self arguments in @implements and trait @use.