fix: change from deprecated sentry client to new sentry sdk

[phongvq]

Description

Deprecated client is unable to send event to Kubernetes cluster (e.g. sentry-kubernetes chart )

This PR is created to replace deprecated sentry client with the new Sentry SDK (as recommended in Sentry document )

[phongvq]

Also I'm not sure if this repo is still maintained or not, but I hope this PR can help people that faced the same issue as me.

[tonyo]

Hey, thanks for reporting! The agent is being rewritten in Go now, so we'll just close this one.