Add CI tests cross-compiling with cargo-lambda

[landonxjames]

cargo-lambda is one of the more popular build tools used by our users. Although we do deploy a Lambda to test our code as part of the CI process, we do all of the building and bundling via custom logic that we own. We should add tests using the cargo-lambda tool since uses a different strategy for cross compiling than we do that can cause issues for users.

References:

• Cannot build [email protected] under Amazon Linux 2023 using cargo lambda. awslabs/aws-sdk-rust#1291
• aws-sdk-s3 no longer compiles under cargo-lambda cargo-lambda/cargo-lambda#859