[Ruby 3.0 support] Add sorting for Dir.glob

[Strech]

I've started the check and it turns out that sorting is not yet implemented in Dir.glob in both default and extended behaviour (sort: Boolean version).

I start adding flags and also add new test case for non-false value of the sort option ruby/spec#894

[eregon]

Ah, @aardvark179 removed it in 56ed1c2, I forgot.
Basically you need to add it back there, and pass the sort: value until there (can be via an extra argument or flags).

[Strech]

Thanks @eregon will check also some other specs regarding respecting {} order

[Strech]

@eregon I decide to go with flags for internal ruby code to keep just one interface there.

[eregon]

Looks good, thank you!