Release v0.21.0 · Azure/terraform-azurerm-avm-res-network-virtualnetwork

What's Changed

New ignore_body_changes interface (#142, closes #61) — a spec-conformant way to suppress out-of-band drift on VNet, subnet, and peering resources. Implements AVM spec TFFR8.
- Root-level ignore_body_changes object keyed by resource type (virtual_networks, virtual_networks_subnets, virtual_networks_virtual_network_peerings), plus a per-subnet override that takes precedence.
- Resolves the AVNM / Azure Policy DINE route-table (and other server-side) infinite-drift problem.
- Validated in CI and live against real AVNM IPAM pools (apply → idempotency, zero drift → destroy).

azapi provider minimum is now ~> 2.12 — ignore_body_changes is a write-only argument introduced in azapi v2.12.0.
Terraform required_version floor stays >= 1.9. Per TFFR8, supplying a non-empty ignore_body_changes value requires Terraform ≥ 1.11; the empty default emits null, so consumers on 1.9/1.10 who don't use the feature are unaffected.
Note: because the value lives in provider-private state, a change to ignore_body_changes only takes effect after an apply.

Thanks to Martin Opedal (@martinopedal) for surfacing the drift issue and the original PR #70.

Full Changelog: v0.20.0...v0.21.0