feat: [HIN] handle multiple webhooks

Problem to solve

We currently use AGENT_WEBHOOK_URL for returning results from trusted ping. This webhook env var should be able to accept multiple webhooks that will look like:

AGENT_WEBHOOK_URL="token1@url1;token2@url2;.."

The token should be sent as X-Api-Key header, to each request.

If at least one web hook success, it success.