EC2 Remote from Windows : ec2_connect.ps1 missing

## Problem

When trying the new experimental feature to "connect to EC2 instance in a new Remote window" from Windows, the script `ec2_connect.ps1` is missing.


Logs :

```
2024-12-16 13:36:48.386 [error] aws.ec2.openRemoteConnection: Error: Failed to update connect script [ConnectScriptUpdateFailed]
-> EntryNotFound (FileSystemError): Error: ENOENT: no such file or directory, open 'c:\Users\[redacted]\.vscode\extensions\amazonwebservices.aws-toolkit-vscode-3.39.0\resources\ec2_connect.ps1' [FileNotFound]
```

## Steps to reproduce the issue

1. Start VSCode on Windows, with AWS Toolkit 3.39
1. Enable experimental feature "ec2RemoteConnect"
2. Browse to an EC2 in AWS Toolkit explorer
3. Click the button "connect to EC2 instance in a new Remote window"
4. The error is shown

## Expected behavior

I should be able to open a new VSCode window, connected to this remote EC2 through SSM.

## System details (run `AWS: About` and/or `Amazon Q: About`)

- OS: Windows 11
- Visual Studio Code version: 1.96.0
- AWS Toolkit version: 3.39.0
- Amazon Q version: NA

Start with the EC2 remote connection flow and the resources/ec2_connect.ps1 path shown in the log, then reproduce the steps on Windows with the ec2RemoteConnect feature enabled. Trace how the connect script is packaged or located; done means a new VS Code window connects to the EC2 instance through SSM without the missing-file error.

Written by the indexing model from the issue text.