feat: adding new otelcol.exporter.file

[aw1cks]

PR Description

Which issue(s) this PR fixes

Notes to the Reviewer

PR Checklist

• CHANGELOG.md updated
• Documentation added
• Tests updated
• Config converters updated

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[dehaansa]

The initial state here looks good - to get this contribution merged we would need

• CLA signed
• Unit Tests
• Documentation
• Converter implementation
• Changelog

Are you interested in working through all of the steps to get this contributed? Otherwise we'll have a team member working on this in one of the next few releases, I don't currently have a timeline commitment.

[aw1cks]

Thanks for the initial review @dehaansa ! I have got this working locally and hope to get some time to finish off those last few bits within the next week.

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