Shell - Httpie adds extra https:// for URLs that start with environment variables

[CiaranMacCarthaigh]

Describe the bug
When using a URL that starts with an environment variable, and the environment variable starts with https://, the code generator for Shell - Httpie adds another https:// to the start of the URL.

Example:

Given a request URL {{GoogleUrl}}/doodles, where the enviroment variable for GoogleUrl is https://google.ie, the Shell - Httpie code generator creates http --follow --timeout 3600 GET https://https://google.ie/doodles.

Notes:

1. This only occurs when using HTTPS. When the environment variable starts with "http://", e.g. http://google.ie, the code generator creates http --follow --timeout 3600 GET http://google.ie/doodles.

2. For URLs that do not start with environment variables, e.g. https://google.ie/doodles, the code generator creates the correct URL.

To Reproduce
Steps to reproduce the behaviour:

1. Create an environment in Postman with a variable named GoogleUrl. Set the current value to https://google.ie
2. Create a GET request with the URL as {{GoogleUrl}}/doodles.
3. Set the current environment to the one you created before and click on Send. Verify that the request returns 200 OK.
4. Click on Code and then select "Shell - Httpie" from the list. Note that the code generator has added an extra https:// at the beginning of the URL.

Additional context
Reproducible in Postman v7.31.1. At time of writing, this was the latest version.