Add with_xrpld build option and Conan package test

[thejohnfreeman]

Related to #5028. The Clio trigger from that branch needs to be merged with this one.

[godexsoft]

@Bronek this is still awaiting your review 🙇

[thejohnfreeman]

I renamed the option to be more consistent with the other option names (especially tests).

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 71.4%. Comparing base (e8602b8) to head (ab35eac).

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #5052   +/-   ##
=======================================
  Coverage     71.4%   71.4%           
=======================================
  Files          796     796           
  Lines        67031   67031           
  Branches     10865   10865           
=======================================
+ Hits         47831   47833    +2     
+ Misses       19200   19198    -2     

see 3 files with indirect coverage changes