Add support for tags, processors and the preserve_original_event to mysql

[ritalwar]

Proposed commit message

This PR adds tags, processors, and preserve_original_event to MySQL's error and slowlog datastreams.
It also updates pipelines to rename the message field to event.original and handle cases where tags contain preserve_original_event.

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

• Closes [Mysql] Add support for tags, processors & preserve_original_event #8626

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• Start Time: 2023-12-13T08:27:18.724+0000

• Duration: 25 min 39 sec

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Test	Results
Failed	0
Passed	41
Skipped	0
Total	41

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[ritalwar]

/test

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (2/2)	💚
Files	100.0% (2/2)	💚 15.385
Classes	100.0% (2/2)	💚 15.385
Methods	93.103% (27/29)	👍 3.273
Lines	89.474% (170/190)	👍 0.259
Conditionals	100.0% (0/0)	💚

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[muthu-mps]

LGTM!

[niraj-elastic]

Everything else LGTM apart from this comment.

[mrodm]

Hi @ritalwar, please update your branch with the latest contents from main branch. There was an important PR merged updating the CI pipelines. Thanks!

[niraj-elastic]

LGTM!

[elasticmachine]

Package mysql - 1.17.0 containing this change is available at https://epr.elastic.co/search?package=mysql