ci: use hashicorp/setup-terraform in provider workflow

The default ubuntu image no longer includes Terraform by default. We now need to install it at runtime instead.

Author: jar-b

.github/workflows/provider.yml

@@ -281,6 +281,10 @@ jobs:
       - uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5.0.2
         with:
           go-version-file: go.mod
+      - uses: hashicorp/setup-terraform@b9cd54a3c349d3f38e8881555d616ced269862dd
+        with:
+          terraform_version: ${{ env.TERRAFORM_VERSION }}
+          terraform_wrapper: false
       - uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
         continue-on-error: true
         timeout-minutes: 2