Files supplied by a FileSystemProvider do not persist in QuickOpen history

[gjsjohnmurray]

Issue Type: Bug

When a workspace root uses a FileSystemProvider extension to serve files, the files opened from there only appear in QuickOpen's "recently opened" list while they remain open. As soon as they are closed they get removed from this history.

This seems to be the cause:

vscode/src/vs/workbench/services/history/browser/history.ts

Lines 568 to 577 in eb141a8

	// for now, only prefer well known schemes that we control to prevent
	// issues such as https://github.com/microsoft/vscode/issues/85204
	// from being used as resource inputs
	// resource inputs survive editor disposal and as such are a lot more
	// durable across editor changes and restarts
	const validResourceEditorInputScheme =
	resource?.scheme === Schemas.file ||
	resource?.scheme === Schemas.vscodeRemote ||
	resource?.scheme === Schemas.userData ||
	resource?.scheme === this.pathService.defaultUriScheme;

This behaviour adversely affects the user experience when working with virtual filesystems.

Pinging @bpasero who apparently added this restriction in response to #85204

VS Code version: Code - Insiders 1.56.0-insider (9a4d524, 2021-04-27T06:15:26.914Z)
OS version: Windows_NT x64 10.0.19042

[bpasero]

/duplicate #108935