Support the configuration API for generic configuration providers

### Feature request type

enhancement

### Is your feature request related to a problem? Please describe

Currently, when running the garnet server we must provider either command-line arguments or a `garnet.conf` JSON file.
By adopting the https://learn.microsoft.com/en-us/dotnet/core/extensions/configuration we will be able to use any configuration provider and require less manual work for maintaining the [Options](https://github.com/microsoft/garnet/blob/0f32b57e77f2abd19990b387747ece82474ed566/libs/host/Configuration/Options.cs) file

### Describe the solution you'd like

building on top of #579 we would call `builder.Configuration.AddEnvironmentVariables(prefix: "GARNET_")` (see https://learn.microsoft.com/en-us/dotnet/core/extensions/configuration-providers#prefixes)

### Describe alternatives you've considered

_No response_

### Additional context

_No response_

Start with libs/host/Configuration/Options.cs and the configuration changes from issue #579. Trace how the Garnet server currently reads command-line arguments and garnet.conf, then compare that flow with the .NET configuration API. Done means the server can use generic providers, including environment variables with the GARNET_ prefix, while preserving existing configuration behavior.

Written by the indexing model from the issue text.