Enable 'FF_USE_POWERSHELL_PATH_RESOLVER' by default
FF_USE_POWERSHELL_PATH_RESOLVER
enables the use of GetUnresolvedProviderPathFromPSPath
to resolve pathnames. This allows pathnames to be easily converted from Linux-style paths to Windows-style within the shell, which has the best context on performing the operation.
This FF has been used for some time by those using the Runner from a linux host and connecting to a Windows environment (for example, in mixed-node Kubernetes cluster). We should now enable this by default, and if there's no reported problems, make it the default forever and remove the FF.