Westend #22648256: invalid signature for precommit in grandpa justification

## Describe the bug

Gossamer could not successfully validate a Grandpa justification while following tip at block #22648256:

```
2024-09-19T17:57:20Z ERROR processing block #22648256 (0xb0d92d06e6dc1d078ee38ecced208803a869b4e6e31d6402bbb157a225bb31ff) failed: verifying justification: decoding and verifying justification: bad justification for header: invalid signature for precommit in grandpa justification pkg=sync

2024-09-19T17:57:20Z CRITICAL current sync strategy failed with: while handling ready block: verifying justification: decoding and verifying justification: bad justification for header: invalid signature for precommit in grandpa justification pkg=sync

2024-09-19T17:57:20Z INFO [FINISHED] worker 12D3KooWJifoDhCL3swAKt7MWhFb7wLRFD9oG33AL3nAathmU24x, request: BlockRequestMessage RequestedData=19 StartingBlock={22648251} Direction=0 Max=8 pkg=sync

2024-09-19T17:56:54Z INFO 🚣 currently syncing, 49 peers connected, finalized #22641152 (0xc1878bb1...490605cb), best #22648250 (0xc291e489...20beec70) pkg=sync
```

This issue is related and should be fixed once Gossamer starts to receive Commit messages from validators which mean that we will always have the highest finalized block, as we can see the highest finalized block is #22641152 which is not the highest finalized block of the network

Blocked by issue: https://github.com/ChainSafe/gossamer/issues/2931