ROS 2 control liblely instalation

[KmakD]

This automates installation of liblely and libgiod libraries.
Super build was used to install required libraries only during initial build of the project

[rafal-gorecki]

for me the version below is simpler

include(ExternalProject)

ExternalProject_Add(
  ep_liblely
  SOURCE_DIR ${CMAKE_CURRENT_BINARY_DIR}/ep_liblely/upstream
  INSTALL_DIR ${CMAKE_INSTALL_PREFIX}
  GIT_REPOSITORY https://gitlab.com/lely_industries/lely-core.git
  GIT_TAG v2.3.3
  PREFIX ${CMAKE_CURRENT_BINARY_DIR}/ep_liblely
  CONFIGURE_COMMAND autoreconf -i <SOURCE_DIR>
  COMMAND <SOURCE_DIR>/configure --prefix=<INSTALL_DIR> --disable-python
  --disable-tests --disable-static
  BUILD_COMMAND $(MAKE) -C <BINARY_DIR>
  INSTALL_COMMAND make install INSTALL_PREFIX=<INSTALL_DIR>
)

ExternalProject_Add(
  ep_panther_hardware_interfaces
  DEPENDS ep_liblely
  SOURCE_DIR ${PROJECT_SOURCE_DIR}
  CMAKE_ARGS -DUSE_SUPERBUILD=OFF
  INSTALL_COMMAND ""
  BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}
)

[KmakD]

I left DEPENENCIES variable to keep more uniform structure of super build file where usually multiple dependencies are installed