Add status field for L2VPN

### NetBox version

v4.1.1

### Feature type

Data model extension

### Proposed functionality

Add status fueld for VPN->L2VPNs

### Use case

To capture L2VPN lifecycle status such as planned, active, decommissioned

### Database changes

Need to extend L2VPN model to include status field and update UI views and filters to account fo it

### External dependencies

_No response_