Visual testing improve baselines

[liza-mae]

We need to improve how our baselines are done for visual testing to keep the baseline for PRs from updating to latest, as is the case here:

This change was checked in with an icon update and caused failures across PRs that were based prior to the update:
#51696

Example:
https://percy.io/elastic/kibana/builds/3325533

With existing tool we would have to see if we can do something custom, some examples were sent.

[elasticmachine]

Pinging @elastic/kibana-operations (Team:Operations)

[liza-mae]

I believe the PR for this is:
#52154

I pinged Spencer this morning, that we are waiting on review.

Spencer, can you update ETA for it?

Thanks!

[liza-mae]

@tylersmalley @spalger can we reassess moving the expected delivery date up on this?
I see it has been moved to 7.9, I would like to aim for something sooner. Let me know what still needs to be done and what the road blocks are? Thanks!

[liza-mae]

cc: @mdelapenya

[tylersmalley]

@liza-mae @spalger, is this issue still necessary? Are we still doing visual testing?

[liza-mae]

@tylersmalley we may still do some visual testing, however we can close this particular issue as it is out of date now. Thanks.