[cisco_umbrella] Revert S3 multiline

[LaZyDK]

What does this PR do?

Reverts configuration for handling of multiline messages from Umbrella Auditlogs.

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.

[LaZyDK]

This pull is needed to get the Cisco Umbrella integration working again.
After deploying version 1.9.1 we get this error, and data is not being fetched anymore.
Unit state changed aws-s3-default (CONFIGURING->FAILED): [failed to reloading inputs: 1 error: Error creating runner from config: error while parsing multiline parser config: unknown matcher type: accessing 'file_selectors.7.parsers.0.multiline' accessing 'file_selectors.7']

[elasticmachine]

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• Start Time: 2023-04-04T16:32:56.692+0000

• Duration: 15 min 32 sec

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Test	Results
Failed	0
Passed	10
Skipped	0
Total	10

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[LaZyDK]

Ready to test and merge.

[bhapas]

/test

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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	95.238% (20/21)	👍
Lines	94.805% (511/539)	👍
Conditionals	100.0% (0/0)	💚

[elasticmachine]

Package cisco_umbrella - 1.9.2 containing this change is available at https://epr.elastic.co/search?package=cisco_umbrella