Revert "Revert "add 'configuration' (read uri/path) of workspace config file, #41408""

This reverts commit 1cacde34.

src/vs/platform/workspace/common/workspace.ts

@@ -198,7 +198,7 @@ export class Workspace implements IWorkspace {
 	}
 
 	public toJSON(): IWorkspace {
-		return { id: this.id, folders: this.folders, name: this.name };
+		return { id: this.id, folders: this.folders, name: this.name, configuration: this.configuration };
 	}
 }
 

src/vs/workbench/api/node/extHost.protocol.ts

@@ -72,6 +72,7 @@ export interface IWorkspaceData {
 	id: string;
 	name: string;
 	folders: { uri: UriComponents, name: string, index: number }[];
+	configuration: UriComponents;
 }
 
 export interface IInitData {

src/vs/workbench/api/node/extHostExtensionService.ts

@@ -22,6 +22,7 @@ import { Barrier } from 'vs/base/common/async';
 import { ILogService } from 'vs/platform/log/common/log';
 import { IEnvironmentService } from 'vs/platform/environment/common/environment';
 import { ExtHostLogService } from 'vs/workbench/api/node/extHostLogService';
+import URI from 'vs/base/common/uri';
 
 class ExtensionMemento implements IExtensionMemento {
 
@@ -108,6 +109,7 @@ class ExtensionStoragePath {
 				join(storagePath, 'meta.json'),
 				JSON.stringify({
 					id: this._workspace.id,
+					configuration: URI.revive(this._workspace.configuration).toString(),
 					name: this._workspace.name
 				}, undefined, 2)
 			);