distrodata/maintainers: Add PARSE_ALL_RECIPES flag to fix test issues
Currently the test depends on which DISTRO_FEATURES and targets are selected.
Similar to SOURCE_MIRROR_FETCH, add PARSE_ALL_RECIPES to allow the test to see
a much wider range of them. This avoids issues added by the new ucontext musl
specific recipe and allows the current whitelist to be cleared out a bit (more
cleanup can follow).
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
