wrong Swift Codegen (httpSession)

[badnikhil]

Tell us about the task you want to perform and are unable to do so because the feature is not available

the code generated for swift urlsession is wrong

Describe the solution/feature you'd like us to add

fix the codegen logic
1.String Interpolation Syntax Error in error and response string(for print)
2. async requests is never made in current code

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