[Fleet] Don't show agentless options for integration policies for on-prem deployments

[kpollich]

We don't support agentless outside of ESS or serverless, so we shouldn't expose these options to on-prem users.

[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)

[jen-huang]

@kpollich With #194885 we hide agentless-only integrations for deployments that don't support agentless. Similarly, the "setup technology" selector in the policy editor only shows if the deployment and integration supports agentless.

There's a few more policy related tweaks that need to be done for agentless, the list will be fleshed out in elastic/package-spec#805.

Is there more meant by this issue?

[kpollich]

Perfect looks like this is already done. I filed this in response to an incoming request and didn't have a chance to confirm the behavior. Thanks Jen!