Revert "github-actions: use GH app to manage the projects"

[v1v]

Reverts #1660

I need to find out why the permission is not correct... hence, I prefer to revert until I figure out what's going on

See https://github.com/elastic/apm-agent-go/actions/runs/11216690372

Error: Could not create installation access token.
    at createInstallationAccessToken (file:///home/runner/work/_actions/tibdex/github-app-token/3beb63f4bd073e61482598c45c71c1019b59b73a/dist/main/index.js:9:86267)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async file:///home/runner/work/_actions/tibdex/github-app-token/3beb63f4bd073e6[14](https://github.com/elastic/apm-agent-go/actions/runs/11216690372/job/31176542839#step:2:15)82598c45c71c1019b59b73a/dist/main/index.js:9:87518
    at async run (file:///home/runner/work/_actions/tibdex/github-app-token/3beb63f4bd073e61482598c45c71c1019b59b73a/dist/main/index.js:9:88811)
    at async file:///home/runner/work/_actions/tibdex/github-app-token/3beb63f4bd073e61482598c45c71c1019b59b73a/dist/main/index.js:9:87468 {
  [cause]: RequestError [HttpError]: The permissions requested are not granted to this installation.
      at file:///home/runner/work/_actions/tibdex/github-app-token/3beb63f4bd073e61482598c45c71c1019b59b73a/dist/main/index.js:1:64431
      at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
      at async createInstallationAccessToken (file:///home/runner/work/_actions/tibdex/github-app-token/3beb63f4bd073e61482598c45c71c1019b59b73a/dist/main/index.js:9:86119)
      at async file:///home/runner/work/_actions/tibdex/github-app-token/3beb63f4bd073e61482598c45c71c1019b59b73a/dist/main/index.js:9:87518
      at async run (file:///home/runner/work/_actions/tibdex/github-app-token/3beb63f4bd073e61482598c45c71c1019b59b73a/dist/main/index.js:9:88811)
      at async file:///home/runner/work/_actions/tibdex/github-app-token/3beb63f4bd073e61482598c45c71c1019b59b73a/dist/main/index.js:9:87468 {
    status: 422,
    response: {
      url: 'https://api.github.com/app/installations/5453[16](https://github.com/elastic/apm-agent-go/actions/runs/11216690372/job/31176542839#step:2:17)29/access_tokens',
      status: 422,
      headers: [Object],
      data: [Object]
    },
    request: {
      method: 'POST',
      url: 'https://api.github.com/app/installations/54531629/access_tokens',
      headers: [Object],
      body: '{"permissions":{"repository_projects":"write"}}',
      request: [Object]
    }
  }
}