ContainerApps support for storage

[et1975]

This PR adds support for poorly documented storage mounting.

The changes in this PR are as follows:

• Adds DSL similar to ACI wrt storage/volume/mounts
• Fixes my earlier AppGateway helper functions naming (contracted "curry tuple" to "tuple" instead of "curry")
• Switched the target ContainerApps API from -preview to stable
• Fixes param->secret->env bug

I have read the contributing guidelines and have completed the following:

• [x] Tested my code end-to-end against a live Azure subscription.
• [x] Updated the documentation in the docs folder for the affected changes.
• [x] Written unit tests against the modified code that I have made.
• [x] Updated the release notes with a new entry for this PR.
• [x] Checked the coding standards outlined in the contributions guide and ensured my code adheres to them.

            containerApp {
                name "queuereaderapp"
                add_volumes [ Volume.emptyDir "empty-v"
                              Volume.azureFile "certs-v" (ResourceName "certs") myStorageAccount.Name StorageAccessMode.ReadOnly ]
                add_containers [
                    container {
                        name "queuereaderapp"
                        public_docker_image "mcr.microsoft.com/azuredocs/containerapps-queuereader" ""
                        cpu_cores 0.25<VCores>
                        memory 0.5<Gb>
                        add_volume_mounts [ "empty-v", "/tmp"
                                            "certs-v", "/certs" ]
                    }
                ]

For Azure File volumes we create additional proxy resource ManagedEnvironmentStorage under the hood.

Not clear on the purpose of ephemeralStorage, but it's in the ARM spec, so I've added it.

Current UI is useless at showing any of this.

[ninjarobot]

Thanks for the contribution, this is released in 1.7.4 and available on nuget.