Re-organize operations nav items

Release notes

Problem to solve

As part of #211406 (closed), we proposed changes to the Operations nav structure, which we tested out as part of ux-research#833 (closed).

We're creating separate implementation issues for the required changes so they can be handled by the teams responsible for them.

Release will tackle moving Feature Flags and Environments out of Operations as part of --> #225307 (closed)
Configure will tackle moving Kubernetes and Serverless as part of a separate issue, issue reference TBC.
This issue is for implementing the Monitor changes, which essentially just involves re-ordering the remaining nav items within Operations so that similar items are grouped together.

Intended users

User experience goal

Ensure that users can easily find/access all the Operations nav items.

Proposal

Essentially, we are just changing the ordering of the remaining items in the Operations menu, so that similar items are grouped together. Right now it's:

Metrics
Alerts
Incidents
Tracing
Error Tracking
Logs

The proposal is to more closely group the "APM" features and the incident management features together as, right now, the Incident management features are sitting right in the middle of the APM features. Here is the proposed re-order:

Further details

Permissions and Security

Documentation

Availability & Testing

This change, and particularly #246813 (closed) can fail existing end-to-end tests since they access the Kubernetes nav item