[feature] Tool: create module official cmake targets

[uilianries]

A build helper often used in CCI which could be part of Conan Tools.

First idea here.

Also present in CCI now:
conan-io/conan-center-index#4257
conan-io/conan-center-index#4258

from conans.tools import create_module_official_cmake_targets

...

def package(self):
    create_module_official_cmake_targets(
            os.path.join(self.package_folder, "lib", "cmake", "conan-official-foo-targets.cmake"), 
            [{"official": "foo", "namespaced": "foo::foo"}]
     )

/cc @SpaceIm @madebr

• I've read the CONTRIBUTING guide.

[SSE4]

let's do it! should be safe, and we already have a working implementation, so PR shouldn't take a significant effort.