feat: PoC for adding lambda function trigger identifier

[shuwpan]

Description

PoC for adding 'faas.trigger_id' span attribute for elb, sns, sqs, s3.
Proof of concept for (open-telemetry/semantic-conventions#262)
Fixes # (issue)

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Unit test
• Deployed code as lambda layer on aws to verify "faas.trigger_id" is set properly for s3, sns, sqs, alb

Does This PR Require a Core Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[linux-foundation-easycla]

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