[Alerting] Replace old KQL Bar from all Rules

[Erikg346]

Describe the feature:
Replace this old KQL Filter Bar:

Proposed: Add this one:

Describe a specific use case for the feature:
We don't find use on having to write out KQL Syntax, we like the ability to create filter pills instead, as they are easier to manage.
When we have a lot of filters, its harder to manage using the old KQL bar.

[elasticmachine]

Pinging @elastic/response-ops (Team:ResponseOps)

[Erikg346]

is there an update on this?