deploy: byte-order-mark (BOM) in existing cf template causes YAMLSyntaxError and fails deployment

### Describe the bug

When performing manual tweaks to stacks in the console (eg - migrating resources into nested) users can provide a template that starts with a byte-order-mark and this is accepted by the console.

On subsequent deployments using CDK this causes a deployment failure. Updating the stack in console to remove the BOM fixes the issue.

### Expected Behavior

aws-cdk should not have different behaviour to the console upload

### Current Behavior

```
XXXXXXXX: deploying... [1/1]
❌ XXXXXXXXX failed: YAMLSyntaxError: All collection items must start at the same column
at _Collection.parse (/usr/lib/node_modules/aws-cdk/lib/index.js:401:9191)
at /usr/lib/node_modules/aws-cdk/lib/index.js:401:28601
at _Document.parseContents (/usr/lib/node_modules/aws-cdk/lib/index.js:401:13915)
at _Document.parse (/usr/lib/node_modules/aws-cdk/lib/index.js:401:14863)
at Object.parse2 [as parse] (/usr/lib/node_modules/aws-cdk/lib/index.js:401:31141)
at parseDocument (/usr/lib/node_modules/aws-cdk/lib/index.js:423:9258)
at Object.parse2 (/usr/lib/node_modules/aws-cdk/lib/index.js:423:9537)
at parseYamlStrWithCfnTags (/usr/lib/node_modules/aws-cdk/lib/index.js:423:12316)
at deserialize (/usr/lib/node_modules/aws-cdk/lib/index.js:423:1[1915](https://gitlab.XXXXXXXXXXXX))
at deserializeStructure (/usr/lib/node_modules/aws-cdk/lib/index.js:423:12857) {
source: [_Collection]
}
```

### Reproduction Steps

- Deploy a simple stack with aws-cdk
- Pull the template json from the console, edit it, add a byte-order-mark, and update the stack
- Attempt to deploy against that stack with aws-cdk

### Possible Solution

_No response_

### Additional Information/Context

Important to note that all manual work was done in json, so I assume the yaml error was part of an internal process.

### CDK CLI Version

2.136.0 (build 94fd33b)

### Framework Version

_No response_

### Node.js Version

v18.20.1

### OS

Debian 12

### Language

.NET

### Language Version

8.0.203

### Other information

_No response_

Start with the deployment path around parseYamlStrWithCfnTags and deserialize shown in the stack trace, then reproduce the issue by adding a byte-order mark to a deployed template and running a CDK deployment. Done means a template containing a BOM is accepted consistently with the console upload instead of failing with YAMLSyntaxError.

Written by the indexing model from the issue text.