autocomplete: invalid styles are not displayed

[TaneliTuomola]

Describe the bug

Invalid mode CSS styles do not work.

Pull Request Link

No response

Reason for not contributing a PR

• Lack of time
• Unsure how to implement the fix/feature
• Difficulty understanding the codebase
• Other

Other Reason

This is a software regression after #17561
this issue should also be taken into account in the repair. @mertsincan

Reproducer

https://primeng.org/autocomplete#invalid

Environment

https://primeng.org/autocomplete#invalid

Angular version

19

PrimeNG version

v19

Node version

No response

Browser(s)

No response

Steps to reproduce the behavior

https://primeng.org/autocomplete#invalid

Expected behavior

https://primevue.org/autocomplete/#invalid