Support Conditional Integration Usage

**Is your feature request related to a problem? Please describe.**

As an operator of Kubernetes on multiple platforms (AWS, Self-managed, GCP, Azure, etc...). I'd like to maintain a single Elastic Agent policy, while specifying multiple Security Posture Management integrations that are conditionally run depending on specific conditions.

**Describe the solution you'd like**

It would be nice if Security Posture Management integrations supported Elastic Agent [conditions](https://www.elastic.co/guide/en/fleet/current/conditions-based-autodiscover.html). This would allow an operator to choose when and where these integrations run, while using the same policy.

**Describe alternatives you've considered**

1. Have multiple unique Elastic Agent policies for each deployment type.
- I have opted to not go this path as the management overhead here becomes a nightmare
2. Elastic Agent supports sub-policies/reusable policies; https://github.com/elastic/elastic-agent/issues/2227

**Additional context**

The lack of this feature and the overhead (or lack) of alternatives, currently dissuades us from adopting these features.