[Enhancement] - Add secure installation parameter in the simple request app

[ravirajsubramanian]

Description of the enhancement

In the simple_request_app for Request method, sample HTTP request methods are shown with the use of Request API feature.
Secure installation parameter is not showcased in this app.

Suggested solution

Change the URL from hard-coded string to piping it from a installation parameter.
Mark this parameter as a secure parameter and use a template string in the Request API to use it.

[Deleted user]

Can this be assigned to me? Thanks

[Saif-Shines]

Assigned, @itzarshath :)