Do not wrap YAML lines

[maddenp-noaa]

Synopsis

1. Set the width of YAML output lines to infinity to avoid them wrapping. See example below.
2. Factor yaml.dump() calls out to a support function for consistency across call sites.
3. Improve __repr__ dunder methods on Config subclasses.
4. Add format components to Config-subclass test names (e.g. test_something() -> test_yaml_something() for easier targeting with pytest -k

Previously, given config.yaml

foo: bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar

we would get

$ uw config realize --input-file config.yaml --output-format yaml
foo: bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar
  bar

The new behavior is

$ uw config realize --input-file config.yaml --output-format yaml
foo: bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar bar

Type

• Code maintenance (refactoring, etc. without behavior change)
• Enhancement (adds new functionality)

Impact

• This is a breaking change (changes existing functionality)

Technically this is a breaking change because it changes (and improves) the output of repr() and str() on Config objects, though it's unlikely anyone was relying on these.

Checklist

• I have added myself and any co-authors to the PR's Assignees list.
• I have reviewed the documentation and have made any updates necessitated by this change.

[christinaholtNOAA]

LGTM!

[NaureenBharwaniNOAA]

Looks great!