okta: make auth factors and risk behaviors searchable

[efd6]

What does this PR do?

This exposes the debug data factor and risk behavior fields to search.

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

• Recommend review by commit rather than as a single change.

How to test this PR locally

Related issues

• Updates [Filebeat][Okta] Parse invalid risk kv data sent by Okta and add keyword fields from flattened field beats#33677 (require beats additions to match for close).

Screenshots

[elasticmachine]

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Build stats

• Start Time: 2023-02-07T02:27:21.605+0000

• Duration: 15 min 56 sec

Test stats 🧪

Test	Results
Failed	0
Passed	7
Skipped	0
Total	7

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (1/1)	💚
Classes	100.0% (1/1)	💚
Methods	100.0% (19/19)	💚
Lines	87.864% (543/618)	👎 -12.136
Conditionals	100.0% (0/0)	💚

[elasticmachine]

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

[kcreddy]

LGTM

[elasticmachine]

Package okta - 1.15.0 containing this change is available at https://epr.elastic.co/search?package=okta