* Add API endpoint and hook for retrieving restricted packages
* Filter out restricted packages already in use from list of integrations available for an agent config
* Allow list agent configs to optionally return expanded package configs, re
* Filter out agent configs which already use the restricted package already from list of agent configs available for an integration
* Allow more than 20 agent configs to be shown
* Rename restricted to limited; add some common methods to DRY
* Add limited package check on server side
* Adjust copy wording
* Fix typings
* Add some package config api integration tests, update es archive mappings
* Move test to dockerized integation tests directory; move existing epm tests to their own directory
* Remove extra assignPackageConfigs() - already handled in packageConfigService.create()
* Review fixes
* Fix type, reenabled skipped test
* Move new EPM integration test file
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