Explore: Change Logs.tsx to a functional component

[gelicia]

What is this feature?

This changes Logs.tsx to be a functional component. There should be no visible difference to the end user.

Why do we need this feature?

Converting this component to be functional will help further improvements. See https://github.com/grafana/grafana/pull/86431#issuecomment-2082612302 for more details.

Which issue(s) does this PR fix?:

Fixes #87047

Special notes for your reviewer:

Please check that:

• [ ] It works as expected from a user's perspective.
• [ ] If this is a pre-GA feature, it is behind a feature toggle.
• [ ] The docs are updated, and if this is a notable improvement, it's added to our What's New doc.