[Fleet] Unify SetupTechnologySelector in Fleet and CSPM

[juliaElastic]

Follow up after #189612

SetupTechnologySelector is currently duplicated in fleet and cspm plugins: https://github.com/search?q=repo%3Aelastic%2Fkibana%20SetupTechnologySelector&type=code

It should be refactored so that only the Fleet version remains, and the create package policy page renders it when the package supports agentless, for the extension view as well:

kibana/x-pack/plugins/fleet/public/applications/fleet/sections/agent_policy/create_package_policy_page/single_page_layout/index.tsx

Line 401 in a048ad1

{/* TODO move SetupTechnologySelector out of extensionView */}

Currently the CSPM package doesn't have the agentless flag set, so the selector wouldn't be visible if we were to unify it now.

There are also some differences currently:

• the agentless selector is wrapped in an accordion in the cspm view
• the agentless selector is visible in edit mode too in the cspm view

[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)