Custom MULTILINE_PARSER support

[elnurm]

Custom MULTILINE_PARSER

The current implementation of the AWS Fluent Bit Helm chart lacks support for custom MULTILINE_PARSER configurations in the extraParsers section of the values.yaml file. When attempting to define a custom multiline parser in this section, an error is encountered, specifically: [multiline_parser] multiline_logs not registered.

It's possible that there might be nuances or specific configurations required to enable the MULTILINE_PARSER functionality within the extraParsers section that I might not be aware of, if so please correct me.

Description of changes

I added support for the MULTILINE_PARSER in the extraParsers section of the values.yaml file in the AWS Fluent Bit Helm chart. This enhancement allowed me to define custom multiline parsers.

Checklist

• Added/modified documentation as required (such as the README.md for modified charts)
• Incremented the chart version in Chart.yaml for the modified chart(s)
• Manually tested. Describe what testing was done in the testing section below
• Make sure the title of the PR is a good description that can go into the release notes

Testing

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[cdhesse]

I also need support for custom multiline parsers.