Code sign the Sentry lambda layer to use in code signed lambdas

### Problem Statement

In updating our lambdas to take use lambda code-signing I've run into the issue that the Sentry lambda layer is not signed and therefore cannot be used in a code-signed lambda.

Please release a code-signed lambda and with it the version_arn of the signing profile so that we can use the lambda layer in code-signed lambdas.

### Solution Brainstorm

See here for reference: https://aws.amazon.com/blogs/security/best-practices-and-advanced-patterns-for-lambda-code-signing/

In particular if you scroll down to the section about using lambda layers in code-signed lambdas it is possible so long as the layer is signed and the code signing config includes the signing profile version arn of the publisher in the allowed publishers:

```
aws lambda create-code-signing-config \
--description "Allow layers from publisher" \
--allowed-publishers SigningProfileVersionArns="," \
--code-signing-policies "UntrustedArtifactOnDeployment"="Enforce"
```

In terraform we would have something like this:
```
resource "aws_signer_signing_profile" "signing" {
platform_id = "AWSLambda-SHA384-ECDSA"
}

resource "aws_lambda_code_signing_config" "signing" {
allowed_publishers {
signing_profile_version_arns = [
aws_signer_signing_profile.signing.version_arn,

]
}
policies {
untrusted_artifact_on_deployment = "Enforce"
}

depends_on = [aws_signer_signing_profile.signing]
}
```

On this page where you share the `arn` of the lambda layer, it could also include the `version_arn` of the signing profile: https://docs.sentry.io/platforms/javascript/guides/aws-lambda/layer/