[bug] CMake Generator QUIET behaviour and message types.

[n00b42]

1. According to CMake find_package(<pkg> QUIET) should not print (informational) message (unless it could not be found...). However both cmake_find_package as well as CMakeDeps generators still print output even on success.
   E.g. find_package(libsystemd REQUIRED QUIET) results in:

-- Conan: Target declared 'libsystemd::libsystemd'
-- Conan: Component target declared 'libcap::cap'
-- Conan: Target declared 'libcap::libcap'
-- Conan: Target declared 'libmount::libmount'
[...]

I found CONAN_CMAKE_SILENT_OUTPUT which silences the output, but my question is if "QUIET" should not already do that.

2. Looking into the corresponding generated cmake files, I found something else: it looks like the message type is dropped, is this intentional?

 function(conan_message MESSAGE_OUTPUT)
     if(NOT CONAN_CMAKE_SILENT_OUTPUT)
         message(${ARGV${0}})

I.e. conan_message(FATAL_ERROR [...] will result in a message([...]

Environment Details (include every applicable attribute)

• Operating System+version: debian/testing (Debian 5.14.9-2 (2021-10-03) x86_64 GNU/Linux)
• Compiler+version: gcc 10.3.0
• Conan version: 1.42.0
• Python version: 3.9.7