Reduce redundancy between service container and autowiring docs

[lacatoire]

This addresses part of #22232 by reducing redundant content between
service_container.rst and service_container/autowiring.rst.

Changes:

• Remove duplicate debug:autowiring output that appeared twice in
  service_container.rst (replace with a back-reference to the first
  occurrence)
• Add a tip about the #[Autowire] attribute after the "Manually Wiring
  Arguments" section, pointing to the dedicated autowiring docs
• Add a cross-reference to named autowiring aliases in the "choose a
  specific service" section
• Expand the "The autowire Option" section with specific links to
  key topics covered in the autowiring page (multiple implementations,
  #[Autowire] attribute, closures)

Fixes #22232