schema: add jsonschema definition to cc_scripts_vendor

[Chad Smith]

Add initial jsonschema definition for validation of cloud-config
user data to cloudinit/config/cc_scripts_vendor.py.

Add a schema dictionary to the cc_*.py module which describes allowed
cloud-config properties which are honored by the module.

jsonschema support for a cloud-config module should entail:
 - module-level schema dict definition in cc_*py
   - schema should contain the keys:
     id, name, title, description, distros, examples, frequency, type,
     properties
 - handler should call validate_cloudconfig_schema(cfg, schema) if valid
   top-level config module keys are provided

Good examples are:
- cloudinit/config/cc_runcmd.py
- cloudinit/config/cc_ubuntu_drivers.py
- cloudinit/config/cc_zypper_add_repo.py
- cloudinit/config/cc_ntp.py

[Chad Smith (chad.smith)]

Upstream commit landed fixing this bug
https://github.com/canonical/cloud-init/commit/96eb95a9d96546af8f6123c905cf62905e61dc48

[James Falcon (falcojr)]

This bug is believed to be fixed in cloud-init in version 22.2. If this is still a problem for you, please make a comment and set the state back to New

Thank you.

[James Falcon (falcojr)]

Tracked in Github Issues as https://github.com/canonical/cloud-init/issues/3579