meshery: [Chore] Update Handlers to use new Meshkit Errors

Current Behavior

Meshery Server (and its other components, like Adapters) use a centralized library, MeshKit, to provide uniform utilities (e.g. raising and logging errors). Currently, Meshery Server uses a now antiquated style of error logging with logrus.

Desired Behavior

Ideally, all use of logrus is replaced with use of MeshKit-style error logging.

Implementation

Meshery Handlers needs to be:

• Updated to use meshkit errors.
• Switch to handler Log instead of logrus

Handlers to update:

• event streamer
• fetch results handler
• k8sconfig handlers
• load test handler
• load test mesh handler
• load test preferences handler (#3390)
• mesh ops handler
• meshery application handler
• meshery filter handler
• meshery pattern handler
• oam handler (#3387)
• performance profiles handler
• provider handler
• schedule handler
• server spec handler
• session sync handler
• user handler
• Grafana handler
• Prometheus Handler

For reference, you can checkout the grafana handler and prometheus handler or the docs.

---

Contributor Guide