tcp,udp: allow YAML custom configuration

[efd6]

What does this PR do?

Adds a YAML configuration to the custom TCP and UDP packages.

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

• Closes [Custom TCP/UDP Logs] Add ability to apply custom configurtion to Custom TCP & UDP logs #5229

Screenshots

TCP

UDP

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• Start Time: 2023-03-08T22:22:08.767+0000

• Duration: 16 min 9 sec

Test stats 🧪

Test	Results
Failed	0
Passed	9
Skipped	0
Total	9

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (0/0)	💚
Files	100.0% (0/0)	💚
Classes	100.0% (0/0)	💚
Methods	100.0% (6/6)	💚 26.667
Lines	100.0% (0/0)	💚
Conditionals	100.0% (0/0)	💚

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

[elasticmachine]

Package tcp - 1.7.0 containing this change is available at https://epr.elastic.co/search?package=tcp

[elasticmachine]

Package udp - 1.7.0 containing this change is available at https://epr.elastic.co/search?package=udp