fix(amazonq): pass uri.path as workspaceIdentifier when initializing AmazonQ lsp

## Problem
workspaceIdentifier should be a string:
- aws/language-server-runtimes#497

## Solution
Update ``extensionContext.storageUri`` with ``extensionContext.storageUri?.path``

Author: LiGaCu

packages/amazonq/src/lsp/client.ts

@@ -134,7 +134,7 @@ export async function startLanguageServer(
                     },
                 },
                 contextConfiguration: {
-                    workspaceIdentifier: extensionContext.storageUri,
+                    workspaceIdentifier: extensionContext.storageUri?.path,
                 },
                 logLevel: toAmazonQLSPLogLevel(globals.logOutputChannel.logLevel),
             },