feat(ec2-metadata-service): implement utils for ec2 metadata service (imds)

[siddsriv]

Issue

#4004

Description

[WIP] Implementing utils for EC2 instance metadata service

Testing

TBD

Additional context

Porting as-is (as much as possible) from JSv2 to maintain parity.

Checklist

• [ ] If you wrote E2E tests, are they resilient to concurrent I/O?
• [ ] If adding new public functions, did you add the @public tag and enable doc generation on the package?

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