Exclude logs by using a pattern or regex in aws-for-fluent-bit chart for EKS

**Is your feature request related to a problem?**
i need to exclude health check logs for my pods to avoid excessive logging

**Is your feature request related to a specific Helm chart, if yes mention name of the chart?**
aws-for-fluent-bit

**Describe the solution you'd like**
able to set any regex/patterns so logs similar to that can be excluded while pushing it to openseach , cloudwatch etc etc

**Describe alternatives you've considered**
this feature is there in fluenbit , so it can be incorporated in aws-for-fluent-bit also

Start by reviewing the aws-for-fluent-bit Helm chart and Fluent Bit's existing filtering capability for excluding health-check logs. Check how the chart configures delivery to OpenSearch and CloudWatch, then define how user-supplied patterns should apply across those outputs. Done means chart users can configure exclusion patterns and verify that matching logs are not forwarded.

Written by the indexing model from the issue text.