[Cloud Security] Update vanilla.yml to scan pki folder recursively

[orestisfl]

What does this PR do?

Sends the correct configuration to cloudbeat for CIS 1.1.19 rule to work correctly. See related PR/issue.

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

• Related to k8s CIS 1.1.19: Scan pki/ folder recursively cloudbeat#981

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• Start Time: 2023-06-20T09:36:35.110+0000

• Duration: 15 min 49 sec

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Name	Metrics % (covered/total)	Diff
Packages	100.0% (0/0)	💚
Files	100.0% (0/0)	💚 2.936
Classes	100.0% (0/0)	💚 2.936
Methods	25.0% (2/8)	👎 -67.737
Lines	100.0% (0/0)	💚 8.176
Conditionals	100.0% (0/0)	💚

[elasticmachine]

Package cloud_security_posture - 1.4.0-preview22 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.4.0-preview23 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.4.0 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture