Bug: esbuild ignores sibling files

### Description:

In addition to the bundle produced by esbuild from my entrypoint, I'd like to include sibling files (like `collector.yaml` for configuring the [ADOT Layer](https://aws-otel.github.io/docs/getting-started/lambda/lambda-js)). If I put the file next to my entrypoint, it's ignored. If I put the file in `.aws-sam/build/MyFunction/` after `sam build` completes, it's deleted by `sam deploy`.

### Steps to reproduce:

1. Configure a CF template with ESbuild Metadata
2. Put `collector.yaml` in the same directory as the entrypoint
3. `sam build`
4. Observe that `collector.yaml` is not present in `.aws-sam/build/MyFunction`
5. Manually copy `collector.yaml` into `.aws-sam/build/MyFunction`
6. `sam deploy`
7. Observe that `.aws-sam/build/MyFunction/collector.yaml` has disappeared
8. Observe, via the AWS Console, that collector.yaml is not present in the Lambda

### Observed result:

I can include additional files in my lambda function.

### Expected result:

I can include additional files in my lambda function.

### Additional environment details (Ex: Windows, Mac, Amazon Linux etc)

1. OS: macOS Venture
5. `sam --version`: `SAM CLI, version 1.65.0`
10. AWS region: `us-east-1

`Add --debug flag to command you are running`