lsp: config auto-detection not reliable

[kitsonk]

In certain scenarios when using multi-root workspaces in vscode a Deno configuration file is not being auto detected (see: denoland/fresh#514).

We should better determine which root to auto detect a configuration file, by enumerating the workspace folders checking their enablement and seeing if there is a config file, until one is found.

We might also want to consider logging out the path searched for a configuration files, wether we find them or not, as we currently only log when we find one, making it difficult to identify why somethings isn't working.

Ref #14455 - re-working workspace folders

[nayeemrmn]

Currently it's by design that we only look at the first workspace folder, auto-detection in other places only makes sense coupled with multi-config monorepo support. Tracked by denoland/vscode_deno#787 and #14245.