Temporarily disable build-terraform-provider CI job (#4043)

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

Author: nogates

.github/workflows/reusable-go-test.yml

@@ -77,6 +77,7 @@ jobs:
           TESTARGS: ${{ matrix.go-build-tags }}
 
   build-terraform-provider:
+    if: false # temporarily disabled
     runs-on: ubuntu-latest
     steps:
       - name: Get GitHub App token