API: schemas: New options API schema

The cluster option metadata doesn't exactly match the OCF RA
specification, so we make three overrides:

• No actions element
• Allow percentage and time types
• Allow an "advanced" attribute to specify that an option is for advanced use only
• Allow a "generated" attribute to specify that an option's value is Pacemaker-generated

Signed-off-by: Reid Wahl <nrwahl@protonmail.com>