ci: disable fuzzing CI on LTS branch (#18500)

Signed-off-by: Julien Pivotto <291750+roidelapluie@users.noreply.github.com>

.github/workflows/fuzzing.yml

@@ -8,23 +8,10 @@ jobs:
   Fuzzing:
     runs-on: ubuntu-latest
     steps:
-      - name: Build Fuzzers
-        id: build
-        uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@cafd7a0eb8ecb4e007c56897996a9b65c49c972f # master
-        with:
-          oss-fuzz-project-name: "prometheus"
-          dry-run: false
-      - name: Run Fuzzers
-        uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@cafd7a0eb8ecb4e007c56897996a9b65c49c972f # master
-        # Note: Regularly check for updates to the pinned commit hash at:
-        # https://github.com/google/oss-fuzz/tree/master/infra/cifuzz/actions/run_fuzzers
-        with:
-          oss-fuzz-project-name: "prometheus"
-          fuzz-seconds: 600
-          dry-run: false
-      - name: Upload Crash
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
-        if: failure() && steps.build.outcome == 'success'
-        with:
-          name: artifacts
-          path: ./out/artifacts
+      - name: Skip fuzzing on LTS branch
+        # Fuzzing CI is disabled on this LTS branch because the oss-fuzz
+        # integration was updated on main to use Go native fuzzing, which is
+        # incompatible with this branch. Since oss-fuzz has no versioned
+        # releases, there is no older stable version to pin to. Fuzzing
+        # continues to run on the main branch.
+        run: true