[cloud_security_posture] Allow multiple installations

[amirbenun]

Allow multiple installations of the cloud_security_posutre package on the same agent policy.
This change is required for the agentless epic.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

Author's Checklist

• [ ]

How to test this PR locally

Related issues

• Related: https://github.com/elastic/security-team/issues/6945

Screenshots

[elasticmachine]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

Expand to view the summary

Build stats

• Start Time: 2023-10-03T11:09:05.414+0000

• Duration: 15 min 25 sec

Test stats 🧪

Test	Results
Failed	0
Passed	4
Skipped	0
Total	4

🤖 GitHub comments

Expand to view the GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

[eyalkraft]

How will we make sure it doesn't happen in ESS? only on the agentless policy?

[amirbenun]

@eyalkraft We won't, once we allow it there is no reason to do that distinction.

[orestisfl]

Should this be pushed for this release?

[amirbenun]

It can be a part of this release, no reason to hold it back.

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (0/0)	💚
Files	100.0% (0/0)	💚
Classes	100.0% (0/0)	💚
Methods	25.0% (2/8)	👎 -50.758
Lines	100.0% (0/0)	💚
Conditionals	100.0% (0/0)	💚

[elasticmachine]

Package cloud_security_posture - 1.6.0-preview15 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.6.0-preview16 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.6.0 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture