[Host Isolation][UX] Allow multiple IP addresses for host exception values

[nicpenning]

Describe the feature: As an Elastic stack engineer, I would like to add all IP addresses that can be logically be grouped into a single exception instead of creating multiple exception per IP address / IP CIDR.

Describe a specific use case for the feature: I do not want to create 5 rule exceptions where 1 can do the trick.

This would suffice:

I imagine this would change the current IS statement to IS ONE OF.

[elasticmachine]

Pinging @elastic/security-solution (Team: SecuritySolution)

[elasticmachine]

Pinging @elastic/security-defend-workflows (Team:Defend Workflows)

[ferullo]

cc @caitlinbetz