[Fleet] added check for Enterprise license in package policy create/update APIs

[juliaElastic]

Summary

Relates https://github.com/elastic/ingest-dev/issues/3464

Added check to reject integration policy shared by multiple agent policies if Enterprise license is not available.

Testing

• Enable a local enterprise licence (steps)
• Enable flag enableReusableIntegrationPolicies
• Try create/update package policy API with multiple policy_ids, expect to work

Repeat the steps with any lower licence, the API should reject the request with a 400 error.

POST kbn:/api/fleet/package_policies
{
  "policy_ids": [
    "policy-1", "policy-2"
  ],
  "package": {
    "name": "apache",
    "version": "1.20.0"
  },
  "name": "apache-4",
  "description": "",
  "namespace": "",
  "inputs": []
}

Test with Basic license:

Test with Enterprise license:

Checklist

• Unit or functional tests were updated or added to match the most common scenarios

[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)

[obltmachine]

🤖 GitHub comments

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Just comment with:

• /oblt-deploy : Deploy a Kibana instance using the Observability test environments.
• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)

[criamico]

LGTM 🚢

[criamico]

I'm not sure if the 8.15 branch was already frozen, but maybe is better to add the label anyway

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 0179553

Metrics [docs]

✅ unchanged

cc @juliaElastic

[kibanamachine]

💔 All backports failed

Status	Branch	Result
❌	8.16	The branch "8.16" does not exist

Manual backport

To create the backport manually run:

node scripts/backport --pr 187467

Questions ?

Please refer to the Backport tool documentation