fix(amazonq): allow symlinks for JDK path (aws#5500)

## Problem

Some users provide a symlink when QCT prompts them for a JDK path, and
this previously was not being accepted.


## Solution

Remove part of a conditional check (`isDirectory`, since that is always
false for symlinks). This allows users to use symlinks, which will work
fine during the local build. Even if someone provides a path that is
*not* a directory now, the local build will fail and build error logs
will open up for them to debug, as usual.

---

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License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Co-authored-by: David Hasani <[email protected]>

Author: dhasani23

packages/amazonq/.changes/next-release/Bug Fix-59842853-a46a-4ffd-b866-e62bec96ad45.json

@@ -0,0 +1,4 @@
+{
+	"type": "Bug Fix",
+	"description": "Amazon Q Code Transformation: allow symlinks for JDK path"
+}

packages/core/src/amazonqGumby/chat/controller/controller.ts

@@ -568,5 +568,5 @@ export class GumbyController {
  */
 function extractPath(text: string): string | undefined {
     const resolvedPath = path.resolve(text.trim())
-    return nodefs.existsSync(resolvedPath) && nodefs.lstatSync(resolvedPath).isDirectory() ? resolvedPath : undefined
+    return nodefs.existsSync(resolvedPath) ? resolvedPath : undefined
 }