Merge user launch configurations and tasks from per-solution .vscode.d folder into workspace files

[JonatanAntoni]

Fixes

• Drop-In file for tasks.json and launch.json ARM-software/vscode-cmsis-csolution#508

Changes

• Revert merging of workspace and solution level .vscode/launch.json.d/*.json and .vscode/tasks.json.d/*.json
• Consider only solution level .vscode.d/launch.json and .vscode.d/tasks.json files

Screenshots

Checklist

• 🤖 This change is covered by unit tests (if applicable).
• 🤹 Manual testing has been performed (if necessary).
• 🛡️ Security impacts have been considered (if relevant).
• 📖 Documentation updates are complete (if required).
• 🧠 Third-party dependencies and TPIP updated (if required).

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[qltysh]

Coverage Impact

This PR will not change total coverage.

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[edriouk]

LGTM