ci: Suppress evals on forks (#32479)

Be kind to those with Zed forks.

Example [action run on
fork](https://github.com/G36maid/freebsd-ports-zed/actions/runs/15525942275)
where [this
job](https://github.com/G36maid/freebsd-ports-zed/actions/runs/15549650437/job/43777665341)
will wait forever. Sorry @G36maid

Release Notes:

- N/A

.github/workflows/eval.yml

@@ -30,6 +30,7 @@ jobs:
   noop:
     name: No-op
     runs-on: ubuntu-latest
+    if: github.repository_owner == 'zed-industries'
     steps:
       - name: No-op
         run: echo "Nothing to do"

.github/workflows/unit_evals.yml

@@ -19,6 +19,7 @@ env:
 
 jobs:
   unit_evals:
+    if: github.repository_owner == 'zed-industries'
     timeout-minutes: 60
     name: Run unit evals
     runs-on: