add also test_requires to CMakeToolchain directories - #12081

I see Docs: omit here, but can we document it better? right now it's a bit obscure...
e.g. there are tool_requires, build_requires, test_requires in addition to regular requirements.
I see that they may have an additional arguments (e.g. transitive_headers and force_host_context are briefly mentioned in Migrating the recipes article).
however, I cannot find a reference for their full signatures anywhere, e.g. what is the list of possible parameters and what are their types?