Improve windows workflow

[azeey]

🦟 Bug fix

Summary

#1049 introduced the Windows Github Action workflow. This PR makes some improvements to the workflow:

• Use script to determine major version number
• Add sscache

The hope is to also fix the issue from #1049 with the Ogre2 plugin not being loaded properly in tests as can be seen from error messages like the following:

17: (2024-08-31 04:51:07.821) [debug] Read GZ_ENGINE_TO_TEST=ogre2
17: (2024-08-31 04:51:07.822) [debug] Read GZ_ENGINE_BACKEND=gl3plus
17: (2024-08-31 04:51:07.822) [info] Loading plugin [gz-rendering-ogre2]
Error: 24-08-31 04:51:07.822) [error] Failed to load plugin [gz-rendering-ogre2] : couldn't find shared library.

Opening as a draft since it's still not able to load the Ogre2 plugin.

Checklist

• Signed all commits for DCO
• Added tests
• 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.

[traversaro]

From what I understand, all the tests (even for Linux and macOS) only work if installed, as the GZ_RENDERING_PLUGIN_PATH in

gz-rendering/CMakeLists.txt

Lines 192 to 196 in a9af984

	if(MSVC)
	set(GZ_RENDERING_PLUGIN_PATH ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR})
	else()
	set(GZ_RENDERING_PLUGIN_PATH ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
	endif()

variable does not point to where the plugins are actually installed.

[traversaro]

From what I understand, all the tests (even for Linux and macOS) only work if installed, as the GZ_RENDERING_PLUGIN_PATH in

gz-rendering/CMakeLists.txt

Lines 192 to 196 in a9af984

	if(MSVC)
	set(GZ_RENDERING_PLUGIN_PATH ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR})
	else()
	set(GZ_RENDERING_PLUGIN_PATH ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
	endif()

variable does not point to where the plugins are actually installed.

And indeed colcon also installs, my bad, so that should not be the problem.