[AutoPR track2_azure-mgmt-network] Add AppGw swagger changes for L4 proxy#8854

openapi-sdkautomation[bot] wants to merge 1 commit intomainAzureSDKAutomation/azure-sdk-for-python:mainfrom

sdkAuto/17561/track2_azure-mgmt-networkAzureSDKAutomation/azure-sdk-for-python:sdkAuto/17561/track2_azure-mgmt-networkCopy head branch name to clipboard