prevent ambiguous configuration for options

[abdulari]

prevent user from running ambiguous command such as:

vscode ➜ /workspaces/devpod (main) $ devpod provider options docker --provider docker2  --debug
10:05:21 info providerName=docker
10:05:21 info GlobalFlags.Provider=docker2
10:05:21 fatal ambiguous provider configuration detected
vscode ➜ /workspaces/devpod (main) $ 

[pascalbreuninger]

Fair point, LGTM! 👍