Update azure/azapi requirement from ~> 1.12 to ~> 2.8

Updates the requirements on [azure/azapi](https://github.com/Azure/terraform-provider-azapi) to permit the latest version.
- [Release notes](https://github.com/Azure/terraform-provider-azapi/releases)
- [Changelog](https://github.com/Azure/terraform-provider-azapi/blob/main/CHANGELOG.md)
- [Commits](Azure/terraform-provider-azapi@v1.12.0...v2.8.0)

---
updated-dependencies:
- dependency-name: azure/azapi
  dependency-version: 2.8.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

terraform-infrastructure/provider.tf

@@ -7,7 +7,7 @@ terraform {
     }
     azapi = {
       source  = "azure/azapi"
-      version = "~> 1.12"
+      version = "~> 2.8"
     }
     random = {
       source  = "hashicorp/random"