added new datatype `yarp::sig::LayeredImage` with test #3572

Job	Run time
Prepare Environment	7s
Check Style	9s
Check Devices Tests	12s
Check License	9s
Run CMake [CMake ${{ matrix.config.cmake_version }} (${{ matrix.config.cmake_generator }}), YCM ${{ matrix.config.ycm_version }}]	0s
Codacy - clang-tidy	0s
Codacy - coverage	0s
[${{ matrix.config.id }}][${{ matrix.config.os }}\|${{ matrix.config.cc }}\|${{ matrix.config.cmake_generator }} (${{ matrix.config.cmake_toolset }} ${{ matrix.config.cmake_platform }})\|${{ matrix.config.build_type }}] ${{ matrix.config.description }}	0s
SonarCloud	0s
	37s

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