The runbook run preview page makes a request per tenant

[droyad]

Problem

A customer reported that they were seeing really slow performance on the runbook run preview page when there were dozens (or 100's) of tenants. We found that a request was being made per tenant every time the tenant filter criteria got changed. This request takes a long time so they build up.

Steps to reproduce:

1. Create a project with a thousand tenants and a few tags that link them up. (or use this script).
2. Create a runbook on the project
3. Setup a run of the runbook, select the tenants by tags. Note the number of requests increase and overlap as you select more and more tags.

Proposed Solution

The deployment preview page does not have this problem as it retrieves the same data in a single call. We should do the same for runbooks.

[octoreleasebot]

Release Note: Improve performance of runbook run preview page when selecting tenants

[Octobob]

🎉 The fix for this issue has been released in:

Release stream	Release
2022.3	2022.3.755
2022.4+	all releases