Replace tibdex/github-app-token with actions/create-github-app-token

[Copilot]

The tibdex/github-app-token action has been archived and is no longer maintained. This PR migrates all GitHub workflows to use the officially supported actions/create-github-app-token@v2 action instead.

Changes Made

Updated 4 workflow files to replace the deprecated action:

• .github/workflows/addToProject.yml - Project management automation
• .github/workflows/labeler.yml - Issue and PR labeling automation
• .github/workflows/updatecli.yml - Dependency update automation
• .github/workflows/pre-post-release.yml - Release process automation

Migration Details

Action replacement:

# Before
uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a

# After  
uses: actions/create-github-app-token@v2

Parameter format changes:

• app_id → app-id
• private_key → private-key
• Complex permissions JSON object → Individual permission-* attributes
• repositories JSON array → Multiline string format

Example transformation:

# Before
permissions: >-
  {
    "contents": "write",
    "pull_requests": "write", 
    "members": "read"
  }

# After
permission-contents: write
permission-pull-requests: write
permission-members: read

All workflows maintain the same functionality while using the supported, actively maintained GitHub action. The migration ensures continued reliability of our automation workflows.

Fixes #4220.

---

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.

[Copilot]

@v1v 👋 This repository doesn't have Copilot instructions. With Copilot instructions, I can understand the repository better, work faster and produce higher quality PRs.

I can generate a .github/copilot-instructions.md file for you automatically. Click here to open a pre-filled issue and assign it to me. I'll write the instructions, and then tag you for review.

[fr4nc1sc0-r4m0n]

LGTM

[SylvainJuge]

Fix for the labeler with Copilot: elastic/oblt-actions#360