Not all required xDAQ components are requested by CMakeLists.txt

Summary

The build system doesn't check for all the required xDAQ components because they're not listed in the find_package(xDAQ) command. The following entries are missing: asyncresolv logxmlappender mimetic peer.

Steps to reproduce

Try to build on a system without the corresponding packages.

What is the expected correct behavior?

Missing packages are detected at configure time and a nice error message is printed.

Relevant logs and/or screenshots

Seen in https://gitlab.cern.ch/lmoureau/cmsgemos/-/jobs/8153137

 CMake Error at cmake/CMSGEMOSFunctions.cmake:44 (add_library):
  Target "gemutils" links to target "xDAQ::asyncresolv" but the target was
  not found.  Perhaps a find_package() call is missing for an IMPORTED
  target, or an ALIAS target is missing?
Call Stack (most recent call first):
  gemutils/CMakeLists.txt:1 (cmsgemos_add_module)
CMake Error at cmake/CMSGEMOSFunctions.cmake:44 (add_library):
  Target "gemutils" links to target "xDAQ::logxmlappender" but the target was
  not found.  Perhaps a find_package() call is missing for an IMPORTED
  target, or an ALIAS target is missing?
Call Stack (most recent call first):
  gemutils/CMakeLists.txt:1 (cmsgemos_add_module)
...on and on with all the libraries listed above... 

Environment

• Version used: develop + !12 (merged) + !13 (merged) + fixes towards working CI build
• Operation System: centos:7 Docker image