SearchKit - load first run as fast as possible, but not too fast

[ufundo]

Overview

Alternative attempt to gain the 600ms on first search kit load

[civibot]

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[civibot]

The issue associated with the Pull Request can be viewed at https://lab.civicrm.org/dev/core/-/issues/6493

[colemanw]

Issue found while testing:

1. Set up a search display + afform
2. Expose a couple filters to the form + enable "save filters"
3. View the page & enter some filters
4. Refresh the page
5. On page load the search runs, then immediate runs again resulting in a flash of results appearing, disappearing, and reappearing.

I think for the RC we should just do the revert: #35692

[ufundo]

Good catch @colemanw

Have merged the straight reverts and redirected this to master.

The whackamole for your bug is to disable in the case there is store-values. But it feels... whackamole. I sort of wonder if we should just concede the 600ms. I can't see how we are going to reliably ensure we have everything for the "final" first load.