[Naming] Reduce instanceof ObjectType on ExpectedNameResolver (take 5)

[samsonasik]

isObjectType()->yes() not always working, see #6422 (comment) for reasoning, that cause error:

2) Rector\Tests\DeadCode\Rector\If_\RemoveDeadInstanceOfRector\RemoveDeadInstanceOfRectorTest::test with data set #21 ('/home/runner/work/rector-src/...hp.inc')
Error: Call to undefined method PHPStan\Type\UnionType::isInstanceOf()

see https://github.com/rectorphp/rector-src/actions/runs/11798721617/job/32865546672?pr=6422#step:5:110

use instanceof ObjectType but reduce its usage.

Ref rectorphp/rector#8815 (comment)

[TomasVotruba]

Just a quick question: are these objects removed in PHPStan 2? If not, we can ignore this error in phpstan.neon and move to next issues.
I recall they were breaking from the start as we use them in more advanced way.

[samsonasik]

it is not removed, just deprecated the usage, I think yes, I agree, we can just ignore it as this got too many too handle, and then variable of its usage needs to be covered.

I will merge this as for now, and look if there is next issues.