ci: add workflow for lambda layer publish and yank

[dbschmigelski]

Description

This pull request introduces new automated workflows for publishing and managing Strands Agents Lambda layers across AWS regions, Python versions, and architectures.

The publishing workflow, defined in publish-lambda-layer.yml, automates layer creation across 136 distinct variants, encompassing 17 regions, 2 architectures, and 4 Python versions. To prevent accidental deployments, the workflow requires explicit version confirmation through the phrase "Create Lambda Layer {version}".

For cases where layer access needs to be restricted, we've implemented a yanking workflow in yank-lambda-layer.yml.

The implementation supports 136 Lambda layers, covering combinations of Python versions (3.10, 3.11, 3.12, 3.13), architectures (x86_64, aarch64), and all 17 non opt-in AWS regions. Each layer follows the naming convention "strands-agents-py{VERSION}-{ARCH}-all" and maintains version synchronization across all variants.

Note: The review and configuration of the IAM role will be conducted outside of the GitHub workflow system to ensure proper security controls and compliance with organizational policies.

Related Issues

#636

Documentation PR

https://github.com/strands-agents/docs/pull/255

Type of Change

New feature

Testing

How have you tested the change? Verify that the changes do not break functionality or introduce warnings in consuming repositories: agents-docs, agents-tools, agents-cli

Tested in dbschmigelski/sdk-python running both publishing and yanking with various configurations.

https://github.com/dbschmigelski/sdk-python/actions/runs/17740370035 https://github.com/dbschmigelski/sdk-python/actions/runs/17740080550

• [ ] I ran hatch run prepare

Checklist

• [ ] I have read the CONTRIBUTING document
• [ ] I have added any necessary tests that prove my fix is effective or my feature works
• [ ] I have updated the documentation accordingly
• [ ] I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• [ ] My changes generate no new warnings
• [ ] Any dependent changes have been merged and published

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[codecov[bot]]

Codecov Report

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