fix(ci): local branches dont need pull_request

Currently each job is run twice if a PR is opened from a local branch,
but in that case we can actually skip the pull_request ones because the
push ones can suffice.

.github/workflows/ci.yml

@@ -7,6 +7,9 @@ jobs:
   test:
     name: Go ${{ matrix.go-version }} with Kafka ${{ matrix.kafka-version }} on Ubuntu
     runs-on: ubuntu-latest
+    # We want to run on external PRs, but not on our own internal PRs as they'll be run
+    # by the push to the branch.
+    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
     strategy:
       fail-fast: false
       matrix:

.github/workflows/fuzz.yml

@@ -7,6 +7,9 @@ jobs:
   test:
     name: Fuzz
     runs-on: ubuntu-latest
+    # We want to run on external PRs, but not on our own internal PRs as they'll be run
+    # by the push to the branch.
+    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
 
     env:
       GOFLAGS: -trimpath