cyberarkpas: Make paths a multi string var

[adriansr]

What does this PR do?

The definition for the paths variable was missing the multi flag, preventing it to be used when setting up the integration in the UI, as it would never be an array.

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.

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Pinging @elastic/security-external-integrations (Team:Security-External Integrations)

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• Start Time: 2022-06-09T10:40:56.021+0000

• Duration: 64 min 50 sec

Test stats 🧪

Test	Results
Failed	0
Passed	87
Skipped	0
Total	87

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (1/1)	💚 3.432
Classes	100.0% (1/1)	💚 3.432
Methods	100.0% (17/17)	💚 11.111
Lines	92.441% (856/926)	👍 2.683
Conditionals	100.0% (0/0)	💚