Only enable FreeBSD private runner on demand

Author: hasufell

.github/workflows/reusable-release.yml

@@ -413,6 +413,7 @@ jobs:
             ./out/*
 
   build-freebsd-x86_64:
+    if: ${{ vars.ENABLE_PRIVATE_RUNNERS == 1 }}
     name: Build FreeBSD x86_64
     runs-on: [self-hosted, FreeBSD, X64]
     env:
@@ -787,7 +788,7 @@ jobs:
     name: Test FreeBSD x86_64
     runs-on: [self-hosted, FreeBSD, X64]
     needs: ["build-freebsd-x86_64"]
-    if: ${{ inputs.test }}
+    if: ${{ inputs.test && vars.ENABLE_PRIVATE_RUNNERS == 1 }}
     env:
       ADD_CABAL_ARGS: ""
       ARTIFACT: "x86_64-portbld-freebsd"