YAML files: Move global settings from `controls` to `org_settings`

[noahtalerman]

• @noahtalerman: Problem is described in this PR and comment in GitHub: YAML files reference docs: windows_migration_enabled #24891 (comment)
• @noahtalerman: In the interim you can only specify controls in either teams/no-team.yml or default.yml but not both. This means that if you want to run policies on hosts in "No team" and set global settings, your global settings have to live under teams/no-team.yml. This is confusing because those settings are global. They apply to all hosts.
• @marko-lisica: Another problem is for items that are supported at the global level (not team level), do we want to error? And vice versa.

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