cds-1705 Enhance Metadata collection and dynamic allocation for App/Subsystem Name

[daidokoro]

This PR enhances the metadata collection capabilities of the shipper. Metadata is now collected from all available integrations internally and can be added using the AddMetadata parameter of the integration.

Dynamic Value allocation syntax has been updated and enhanced allowing for the use of regular expressions to parse available metadata values while setting subsystem and application name values.

{{ metadata | r'regex' }}

• added metadata context type
• implemented metadataContext type to handle metadata cross functinos and threads
• cargo
• updated JSONMessage type with new attribute names, added support functions to struct
• added additoinal metadata for sqs, ecr and kinesis events
• udpatd test
• modified metadata key names and updated MetadataContext struct
• fixed dynamic metadata replacement syntax
• add tests for metadataContext evaluation
• removed headers from LogExporterConfig as the option has been removed in upstream sdk
• added MetadataContext method to handle dynamic metadata allocation and removed old tests
• cargo update
• changelog
• updated README
• adjusted metadata name for s3.key to s3.object.key
• template version bump
• version bump

Important

This PR contains breaking changes

Description

Fixes #

How Has This Been Tested?

Checklist:

• I have updated the versions in the SemanticVersion in template.yaml
• I have updated the CHANGELOG.md
• I have created necessary PR to Terraform Module Repository (https://github.com/coralogix/terraform-coralogix-aws) if needed
• This change does not affect any particular component (e.g. it's CI or docs change)

[daidokoro]

Thanks for the review @RafalSumislawski, I've fixed all the items you've pointed out. Let me know if you spot anything else.