(cli): Add hot-swap support for AWS Synthetics Canaries

### Description

I'd like to hot-swap the code for AWS Synthetics Canaries.

### Use Case

The development experience for canary scripts would be much faster.


### Proposed Solution

I'm not too familiar with the hot-swapping code, but hot-swap likely boils down to uploading the code asset and calling the [UpdateCanary](https://docs.aws.amazon.com/AmazonSynthetics/latest/APIReference/API_UpdateCanary.html) API.

### Other information

_No response_

### Acknowledge

- [ ] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

The issue names no files or tests. Start by reviewing the existing hot-swap implementation and the AWS Synthetics UpdateCanary API, then determine how the canary code asset is uploaded. Done means hot-swapping a canary script updates its code through the requested API without a full deployment.

Written by the indexing model from the issue text.