[otel] add awslogsencodingextension

[mykola-elastic]

What does this PR do?

Adds awslogsencodingextension to EDOT collector. Redo of #11078 (due to severe merge conflicts - EDOT got moved into a separate package #10922)

Why is it important?

awss3receiver (added in #10515) is quite useless without awslogsencodingextension which unmarshals logs encoded in formats produced by AWS services.

Adding awslogsencodingextension would enable us to create input otel package for AWS VPC Flow Logs, ELB Access Logs, Cloudtrail logs, etc.

cc @ishleenk17, @tommyers-elastic

Checklist

• I have read and understood the pull request guidelines of this project.
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in ./changelog/fragments using the changelog tool
• I have added an integration test or an E2E test

[mergify]

This pull request does not have a backport label. Could you fix it @mykola-elastic? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-./d./d is the label that automatically backports to the 8./d branch. /d is the digit
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.

[elasticmachine]

Pinging @elastic/elastic-agent-control-plane (Team:Elastic-Agent-Control-Plane)

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 770ebb4

cc @mykola-elastic

[mykola-elastic]

@swiatekm thanks for the review. Feel free to merge (I don't have the permission)

[ebeahan]

@mykola-elastic confirming - do we need to backport this change? Currently it'll only come out in 9.3 by going into main.

[mykola-elastic]

@ebeahan thanks, no backporting. awss3receiver (merged) will also only be available beginning 9.3