python: Sort methods on python resources consistently

[svix-mman]

These should be the only files that need sorting, the rest of resources have their methods sorted correctly.

[svix-jplatte]

I think "consistently" is not very clear. For the record, this reorders the methods to match what our new codegen tool outputs (which I think it alphabetically ordered per endpoint path, then create > read > update > delete > patch > ...).