feat(bedrock-agentcore-alpha): add fromCodeAsset method to create runtime artifact with local code assets

[go-to-k]

Issue # (if applicable)

Closes #36473.

Reason for this change

Add support for deploying agent runtime code directly from local assets, automatically packaged and uploaded to a CDK-managed S3 bucket. This simplifies the developer experience compared to manually managing S3 buckets and uploads.

Description of changes

Added AgentRuntimeArtifact.fromCodeAsset() static method to create runtime artifacts from local code

This provides a simpler alternative to fromS3() by handling the S3 asset creation automatically, similar to how fromAsset() works for container images.

Describe any new or updated permissions being added

Description of how you validated changes

Both unit tests and an integ test.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[github-actions]

⚠️ Experimental Feature: This security report is currently in experimental phase. Results may include false positives and the rules are being actively refined.
Please try merge from main to avoid findings unrelated to the PR.

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	Tests	Passed ✅	Skipped	Failed
Security Guardian Results	50 ran	50 passed

Test	Result
No test annotations available

• View Security Guardian Results

[github-actions]

⚠️ Experimental Feature: This security report is currently in experimental phase. Results may include false positives and the rules are being actively refined.
Please try merge from main to avoid findings unrelated to the PR.

---

	Tests	Passed ✅	Skipped	Failed
Security Guardian Results with resolved templates	50 ran	50 passed

Test	Result
No test annotations available

• View Security Guardian Results with resolved templates

[mazyu36]

Thank you for the contribution. I've added a nit comment.

[go-to-k]

@mazyu36 Thanks, fixed!

[mazyu36]

Thanks!