Updated test workflow to verify both single and multi file configs

[agazeley]

The change enables the testing of both multiple files NGINX config to NGINX for Azure and single file config

Test procedure is as follows:

• Login to Azure
• Synchronizing the configuration
• Modify the nginx.conf file to proxy_pass to be a random number
• Validating a HTTP request to the NGINX instance by checking for the Github pipeline ID header to be set to the random number previously generated
• Modify the proxy.conf file to proxy_pass the Github pipeline ID
• Synchronize the configuration
• Validating a HTTP request to the NGINX instance by checking for the Github pipeline ID in the header