RFR: 8371425: Include folder names in vscode workspace virtual folders

[Kerem Kat]

Include top-level folder name in the source root, to help distinguishing different vscode instances and include the build configuration name in the "Build artifacts" virtual folder name in vscode, in the generated workspace file from `make vscode-project`.

<img width="400" height="353" alt="image" src="https://github.com/user-attachments/assets/5202aae9-19ff-472e-b966-46419c921370" />

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Commit messages:
 - 8371425: Include folder names in vscode workspace virtual folders

Changes: https://git.openjdk.org/jdk/pull/28194/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28194&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8371425
  Stats: 4 lines in 2 files changed: 2 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/28194.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28194/head:pull/28194

PR: https://git.openjdk.org/jdk/pull/28194