[FEATURE REQ] Flag to disable extract of global policy

### Please describe the feature.

The ApiOps documentation describes a model for supporting distributed API teams working with a single API Management set of resources. The approach describes each team having a dedicated repository and using the Extractor configuration file to control which APIM resources are extracted.

One challenge with this approach is that with the current implementation of the Extractor, each team would end up extracting APIM's global policy. This means teams could potentially introduce global policy changes that introduces issues for other teams using the same APIM. Ideally, customers should have the ability to disable extracting global policy. This would ensure each independent API team doesn't need to extract global policy and customers could have a central team that manages global policy through a separate repo.

Start by locating the Extractor implementation and the configuration file described in the issue, then trace how global policy is selected for extraction. Check whether existing extraction tests cover global policy and identify where a disable option would be validated. Done means teams can disable global policy extraction while other APIM resources continue to be extracted.

Written by the indexing model from the issue text.