Replace ServiceLoader-like implementations lookups in Faces by ServiceLoader itself

[lukasj]

Following specs in EE 9.1 implement ServiceLoader-like implementation lookup themselves:

• Jakarta Faces: Use java.util.ServiceLoader for factories faces#801
• Jakarta XML Binding: Simplify implementation lookup jaxb-api#194
• Jakarta SOAP: Remove deprecated SOAPElementFactory saaj-api#100

In EE 10, they should use ServiceLoader directly

[ivargrimstad]

Faces still left