Extend wide angle cameras to support L8 and L16 image formats

[iche033]

🎉 New feature

Closes gazebosim/gz-sensors#479

Related PR: gazebosim/gz-sensors#494

Summary

Added support for wide angle cameras to read image data back in L8 and L16 image formats for ogre and ogre2

Test it

Updated INTEGRATION_wide_angle_camera test.

From your colcon's gz-rendering's build folder, you can run tests like this:

GZ_ENGINE_TO_TEST=ogre2  ./bin/INTEGRATION_wide_angle_camera
GZ_ENGINE_TO_TEST=ogre  ./bin/INTEGRATION_wide_angle_camera

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.