Add HttpRequestException expected exception handling

[dkbennett]

Summary of the pull request

Adds exception handling to not spam detailed error stack when we have an HttpRequest exception. This keeps the log clean and avoids giving us false alarm exception spam when unrelated network issues happen, such as DNS resolution problems or simply no internet connection.

References and relevant issues

Observed such false alarm spam in: microsoft/devhome#3778

Detailed description of the pull request / Additional comments

• Adds exception catches specifically for HttpRequestException and treats them as warnings and does not log the exception.

Validation steps performed

• Built and deployed fix with forced HttpRequestException thrown to verify handling. Confirmed log has warnings and no exception stack dump and no errors.

PR checklist

• Closes Expected Http errors are noisy in the log and sending false positives of issues #444
• Tests added/passed
• Documentation updated