[AutoPR azure-resourcemanager-appcontainers] Add publicNetworkAccess in managed environment

[azure-sdk]

Create to sync https://github.com/Azure/azure-rest-api-specs/pull/29092

curl -L "https://portal.azure-devex-tools.com/api/sdk-dl-pub?p=Azure/29092/azure-sdk-for-java/azure-resourcemanager-appcontainers/azure-resourcemanager-appcontainers-1.0.0-beta.8.jar" -o azure-resourcemanager-appcontainers-1.0.0-beta.8.jar
mvn install:install-file -DgroupId=com.azure.resourcemanager -DartifactId=azure-resourcemanager-appcontainers -Dversion=1.0.0-beta.0 -Dfile=azure-resourcemanager-appcontainers-1.0.0-beta.8.jar -Dpackaging=jar -DgeneratePom=true

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