VSCode extension FileSystemWatcher not working since 1.33.0

[sgraband]

Bug Description:

Extensions that use the vscode.workspace.createFileSystemWatcher function stopped working with Theia 1.33.0. I was able to narrow it down to this commit.

Feel free to assign this ticket to me as i will investigate it and work on a fix.

Steps to Reproduce:

1. Install the following extension: file-watching-sample-0.0.1.zip
2. Change/Add/Delete a file
3. When using Theia 1.32.0 the file watcher detects the change. But when using 1.33.0 it is no longer detected.

Additional Information

• Operating System: Ubuntu 20.04
• Theia Version: 1.33.0

Test extension code:

export function activate(context: vscode.ExtensionContext) {
	const watcher = vscode.workspace.createFileSystemWatcher(`**/*`, false, false, false);
	context.subscriptions.push(watcher);
	context.subscriptions.push(watcher.onDidCreate(handleFileCreate));
	context.subscriptions.push(watcher.onDidChange(handleFileChange));
	context.subscriptions.push(watcher.onDidDelete(handleFileDelete));
}

function handleFileCreate(uri: vscode.Uri): void {
	console.log(`file created: ${uri.fsPath}`);
	vscode.window.showInformationMessage(`file created: ${uri.fsPath}`);
}

function handleFileChange(uri: vscode.Uri): void {
	console.log(`file changed: ${uri.fsPath}`);
	vscode.window.showInformationMessage(`file changed: ${uri.fsPath}`);
}

function handleFileDelete(uri: vscode.Uri): void {
	console.log(`file deleted: ${uri.fsPath}`);
	vscode.window.showInformationMessage(`file deleted: ${uri.fsPath}`);
}

Another extension that has the same problem is the eclipse-cdt-cloud clangd-context extension.