[qrs]*: ensure event.kind is correctly set for pipeline errors

[efd6]

What does this PR do?

Modify qnap_nas, radware, santa, sentinel_one, slack, snort, snyk, sonicwall_firewall, sophos, sophos_central, squid, symantec_endpoint and sysmon_linux to correctly set event.kind for pipeline errors and ensure error.message is 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.

Author's Checklist

• [ ]

How to test this PR locally

Related issues

• For sei: ensure packages set error.kind to "pipeline_error" in on_failure processor #6582

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• Start Time: 2023-06-22T04:19:30.612+0000

• Duration: 20 min 40 sec

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Test	Results
Failed	0
Passed	173
Skipped	3
Total	176

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (19/19)	💚
Files	100.0% (32/32)	💚 2.817
Classes	100.0% (32/32)	💚 2.817
Methods	97.384% (335/344)	👍 0.924
Lines	91.943% (9700/10550)	👎 -0.538
Conditionals	100.0% (0/0)	💚

[elasticmachine]

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

[bhapas]

LGTM

[elasticmachine]

Package qnap_nas - 1.11.0 containing this change is available at https://epr.elastic.co/search?package=qnap_nas

[elasticmachine]

Package radware - 0.15.0 containing this change is available at https://epr.elastic.co/search?package=radware

[elasticmachine]

Package santa - 3.8.0 containing this change is available at https://epr.elastic.co/search?package=santa

[elasticmachine]

Package sentinel_one - 1.10.0 containing this change is available at https://epr.elastic.co/search?package=sentinel_one

[elasticmachine]

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

[elasticmachine]

Package snort - 1.8.0 containing this change is available at https://epr.elastic.co/search?package=snort

[elasticmachine]

Package snyk - 1.10.0 containing this change is available at https://epr.elastic.co/search?package=snyk

[elasticmachine]

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

[elasticmachine]

Package sophos - 2.10.0 containing this change is available at https://epr.elastic.co/search?package=sophos

[elasticmachine]

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

[elasticmachine]

Package squid - 0.16.0 containing this change is available at https://epr.elastic.co/search?package=squid

[elasticmachine]

Package symantec_endpoint - 2.8.0 containing this change is available at https://epr.elastic.co/search?package=symantec_endpoint

[elasticmachine]

Package sysmon_linux - 0.5.0 containing this change is available at https://epr.elastic.co/search?package=sysmon_linux