Add a local query parameter to support local lookup of FS resources

[traeok]

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

For some use cases, extenders may want to check if a resource exists in the filesystem without making a request to the remote system.

By default, our stat implementation for Data Sets and USS detects modification time changes for a resource and updates any applicable editors with new contents. We must keep this default behavior to continue supporting change detection.

Describe the solution you'd like

Add support for a local query parameter for the URI so that, when called with a URI containing ?local=true, the filesystem will avoid making any remote requests. It should just check whether the resource already exists in the filesystem, returning the appropriate entry if found.

Describe alternatives you've considered

N/A

Additional context

Follow-up on this conversation in #zowe-explorer-vscode channel in the OMP Slack community.

[github-actions]

Thank you for raising this enhancement request.
The community has 90 days to vote on it.
If the enhancement receives at least 10 upvotes, it is added to our development backlog.
If it receives fewer votes, the issue is closed.