[Cloud Security] [AWS Orgs] Add config option

[orestisfl]

Adds the aws.account_type enum option which can take the single_account and organization_account values.

What does this PR do?

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.

Related issues

• Relates [AWS Orgs] Update cloudbeat.yml config to enable multi-account fetching cloudbeat#1037
• Relates [AWS Orgs] Add config option cloudbeat#1072

[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: 2023-06-26T07:58:39.546+0000

• Duration: 14 min 24 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.

[kfirpeled]

LGTM,
@orestisfl please make sure to inform the team we branch out 1.5 and remind them that for backporting to 1.4 they'll need to create a new branch

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (0/0)	💚
Files	100.0% (0/0)	💚 2.769
Classes	100.0% (0/0)	💚 2.769
Methods	25.0% (2/8)	👎 -68.14
Lines	100.0% (0/0)	💚 8.415
Conditionals	100.0% (0/0)	💚

[elasticmachine]

Package cloud_security_posture - 1.5.0-preview20 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.5.0-preview21 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.5.0-preview22 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.5.0-preview23 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.5.0-preview24 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.5.0-preview25 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.5.0-preview26 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.5.0-preview27 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.5.0 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture