Make IDE functionality multi-token mapping aware

[Veykril]

With #10067 we now map tokens down in macros to all their usages and not just the first. IDE functionalities have to be adapted to this change as currently everything expects a 1 to 1 mapping.
In most cases this should be straight forward by just iterating instead of handling a single instance, some require more thought like how hover should deal with this.
This tracks all the things that have to be changed:

• replace find_node_at_offset_with_descend -> find_nodes_at_offset_with_descend in:
  • highlight_related feat: Downmap tokens to all token descendants instead of just the first #10067
  • goto_implementation fix: make goto_implementation multi-token mapping aware #10108
  • references fix: make "find references" multi-token mapping aware #10103
  • rename fix: make rename multi-token mapping aware #10645
  • ide_ssr
• replace descend_into_macros -> descend_into_macros_many in:
  • call_hierarchy internal: Improve call_hierarchy and incoming/outgoing_calls #10250
  • expand_macro fix: make expand_macro multi-token mapping aware #10641
  • goto_declaration fix: make goto_declaration multi-token mapping aware #10639
  • goto_definition fix: make goto_definition multi-token mapping aware #10252
  • goto_type_definition fix: make goto_type_definition multi-token mapping aware #10637
  • hover fix: add multi-token mapping support to hovers #10233
  • runnables fix: add multi-token mapping support to runnables #10188

This list isn't all usages but most of which it would make sense to support this change.
Note in some cases duplicates have to be filtered out as tokens that are emitted multiple times pointing to the same things will multiply outputs.