feat(lambda): add SnapStart support for arm64 functions

[valerena]

Issue # (if applicable)

Closes #30899.

Reason for this change

Lambda released SnapStart support for arm64 functions: https://aws.amazon.com/about-aws/whats-new/2024/07/aws-lambda-snapstart-java-functions-arm64-architecture/

Description of changes

Allow configuring SnapStart on arm64 functions.

Description of how you validated changes

yarn test

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

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

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[valerena]

In the meantime while this gets merged and officially released, people wanting to use SnapStart on their arm64 functions, need to use the workaround that was used before SnapStart was supported in the function L2 construct:
(based on #23153 (comment))

    const fn = new lambda.Function(this, 'Func', {
      runtime: lambda.Runtime.JAVA_21,
      handler: 'example.Handler',
      architecture: lambda.Architecture.ARM_64,
      code: lambda.Code.fromAsset(path.join(__dirname, '../../lambda/example.jar')),
      memorySize: 256,
    });

    // Workaround: Add SnapStart configuration like this:
    (fn.node.defaultChild as lambda.CfnFunction).addPropertyOverride('SnapStart', {
      ApplyOn: 'PublishedVersions',
    });

[msailes]

SnapStart is also available on Java 21.

You might want to flip this around to say "SnapStart is not available on Java 8 (AL1 or AL2)" or words to that effect.

[valerena]

We need to mention that it's only supported in Java, so we can't leave "just Java8" out of the support. (Yes, @msailes, there are other runtimes other than Java 😉)

The official documentation mentions "SnapStart supports Java 11 and later Java managed runtimes", so we can go with something like that.

[xazhao]

LGTM!

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Pull request has been modified.

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• Commit ID: e540091
• Result: SUCCEEDED
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