Bug 1897219 - Add a global map of ping->[ride-along-pings] so we can correctly call it

[badboy]

This now adds a configuration option to pass a map along that would otherwise be set on the individual ping instances.
It thus works for the builtin pings.

The ping-specific list still works and is preferred, only if empty we go for the top-level map.

Aside:
Note that this is technically a breaking change because the whole configuration is public and we cannot provide default values in Rust (we should really fix that as a breaking-change-thing).
If we go this route I'd still vote for handling this as a feature change only (and we'll mark the non-builder Rust API as "private", so changing it isn't a breaking change anymore). This saves us from the hefty coordination with a-s.
Consumers are fine either way, because we can handle the defaults in the bindings and for RLB we're the only ones using it and can deal with it.

I have the patch for m-c ready that would use this too.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 18.60%. Comparing base (7b89f4a) to head (2d435ca).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2839   +/-   ##
=======================================
  Coverage   18.60%   18.60%           
=======================================
  Files           1        1           
  Lines          43       43           
=======================================
  Hits            8        8           
  Misses         35       35           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.