[FEATURE] Enable full clang-tidy build in nightly build

[mgovers]

Describe the feature request

After #736 / #735 , we have a Nightly build that allows running

• [x] Resolve the permissions issue in the Nightly build cfr. https://github.com/PowerGridModel/power-grid-model/actions/runs/11051238009/workflow
  • [x] fix the call to main.yml in https://github.com/PowerGridModel/power-grid-model/blob/main/.github/workflows/nightly.yml#L19 by adding permissions (cfr. https://docs.github.com/en/actions/sharing-automations/reusing-workflows#access-and-permissions and https://docs.github.com/en/actions/sharing-automations/reusing-workflows#example-caller-workflow)
• [x] Resolve the concurrency issue between Nightly and clang-tidy and the main pipeline
  • [x] in nightly.yml, replace the group: ${{ github.workflow }}-${{ github.ref }} (https://github.com/PowerGridModel/power-grid-model/blob/main/.github/workflows/nightly.yml#L14) with group: ${{ github.event_name }}-${{ github.workflow }}-${{ github.ref }} (or similar)
  • [x] idem for all other pipelines
• [x] Re-enable the full clang-tidy build in the nightly, including the benchmark (cfr. https://github.com/PowerGridModel/power-grid-model/blob/main/.github/workflows/nightly.yml#L25)
• [x] Fix the clang-tidy warnings on the tests + benchmark (manual run of the clang-tidy with all targets, cfr. https://github.com/PowerGridModel/power-grid-model/actions/runs/11050900826 )
  • [x] e.g. cfr. https://github.com/PowerGridModel/power-grid-model/actions/runs/11050900826
• [x] Add the status badge for the Nightly pipeline to the README.md (e.g. )