[WIP] Replicate Datadog integration and check for new changes

[afro-coder]

Version

main (1.16.x beta)

Describe the requested changes

As per the Slack thread here https://solo-io.slack.com/archives/C9L6VPAUW/p1700080994874839

The user wasn't able to use Datadog to collect metrics.

They had enabled readConfig: true

The were seeing error's as such

2023-11-16 12:30:18 UTC | CORE | INFO | (pkg/collector/python/datadog_agent.go:133 in LogMessage) | envoy:be6f863798cd9a72 | (utils.py:55) | Envoy endpoint `http://100.*.*.*:8081/server_info` responded with HTTP status code 404

Seems like the datadog integration mentions that

I haven't had a chance to look into this, will try it out and update the docs with a PR

Link to any relevant existing docs

https://docs.solo.io/gloo-edge/1.7.23/guides/integrations/datadog/

Browser Information

No response

Additional Context

No response