test/crimson: specialize fmt::formater<> for types to be formatted

test/crimson: specialize fmt::formater<> for types to be formatted

since fmt v9, fmt::formatter<> is not specialized for the types with
operator<<(ostream&, ...) anymore. so we need to specialize it manually.
in this change, fmt::formatter<> is specialized for some types to be
formatted with fmtlib, so the tree can compile with fmt v9.

Signed-off-by: Kefu Chai <tchaikov@gmail.com>