Install envoy.exe into ProgramData/envoy/bin

*Title*: Install `envoy.exe` into `ProgramData/envoy/bin`

*Description*:
Right now, in the envoy-windows image, envoy.exe installs into `Program Files/envoy/envoy.exe`

While this does match historic install directories, choosing this makes tooling more difficult as for example `make` struggles with spaces.

It would be easier to install into `ProgramData/envoy/bin/envoy.exe` similar to the [Chocolatey](https://chocolatey.org/) package manager: `ProgramData/chocolately/bin/choko.exe`.

Doing so wouldn't be completely unconventional, in other words, and we already write files to this directory, ex. `ProgramData/envoy/envoy.yaml`