Releases are not consistently showing the latest release assets

**Issue**
The available releases on the repo Releases page: [https://github.com/Azure/WindowsVMAgent/releases](https://github.com/Azure/WindowsVMAgent/releases) don't have a consistent release structure, making it more difficult to manually find the latest release and impossible to query the GitHub Releases API to return the list of available VM agent installers.

For example, the [latest release is for the ARM64 architecture](https://github.com/Azure/WindowsVMAgent/releases) only and does not include the agent. The [next available release is for AMD64 agent only](https://github.com/Azure/WindowsVMAgent/releases) and does include the installer assets.

**Desired fix**
Ensure each release on this repo includes the agent for all architectures with attached assets for each available agent installer. This will make manually and programatically finding the latest available VM agent for all platforms simple by viewing the latest release or using the GitHub Releases API to find the latest installers.