Consider making CreateParameter methods as static on ParameterResource

[eerhardt]

See the conversation at #8736 (comment)

These 3 methods on ParameterResourceBuilderExtensions:

https://github.com/dotnet/aspire/blob/86e1f2a11889a92fffbe7f733f09ecf8d3ef4cd9/src/Aspire.Hosting/ParameterResourceBuilderExtensions.cs#L227-L317

Could be moved to static methods on ParameterResource itself:

https://github.com/dotnet/aspire/blob/8929f2f1d497ae37c6142b021983be6f9971e5fa/src/Aspire.Hosting/ApplicationModel/ParameterResource.cs#L9