[conan-center] Check exported patches are the same ones listed in conandata

[danimtb]

Now, I'm seeing this pattern in many recipes:

    def export_sources(self):
        self.copy("CMakeLists.txt")
        for patch in self.conan_data.get("patches", {}).get(self.version, []):
            self.copy(patch["patch_file"])

The recipe is taking care of exporting only the patches it is going to use. Maybe this hook is no longer needed.

That's great then! Probably we have to document this as good practice, so it is easy to check by reviewers or maybe have a hook check that makes sure that the files listed in the reduced conandata are exactly the same ones exported.

Originally posted by @danimtb in #218 (comment)

[prince-chrismc]

CCI docs: conan-io/conan-center-index#11982