[MySQL Enterprise] New package

[P1llus]

What does this PR do?

Moves the MySQL enterprise audit log module from filebeat to integrations, and moving from log to filestream

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.

Closes #652

[elasticmachine]

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

[elasticmachine]

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Build stats

• Start Time: 2022-02-24T08:20:01.658+0000

• Duration: 23 min 42 sec

Test stats 🧪

Test	Results
Failed	0
Passed	5
Skipped	0
Total	5

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