datatrails: throttle the resetting of yaxis

[darrenjaneczek]

What is this feature?

Reduces the resetting of the yaxis ranges by:

• checking if an actual change took place
• throttling the event that notifies the change

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.

[leeoniya]

did not test, but code looks fine 🙈

[grafana-delivery-bot]

Hello @darrenjaneczek!
Backport pull requests need to be either:

• Pull requests which address bugs,
• Urgent fixes which need product approval, in order to get merged,
• Docs changes.

Please, if the current pull request addresses a bug fix, label it with the type/bug label.
If it already has the product approval, please add the product-approved label. For docs changes, please add the type/docs label.
If the pull request modifies CI behaviour, please add the type/ci label.
If none of the above applies, please consider removing the backport label and target the next major/minor release.
Thanks!