Add CIFuzz workflow

Add CIFuzz workflow action to have fuzzers build and run on each PR.

This service is offered by OSS-Fuzz where open5gs already runs. CIFuzz can help
catch regressions and fuzzing build issues early, and has a variety of features
(see the URL above). In the current PR the fuzzers gets build on a pull request
and will run for 300 seconds.

Signed-off-by: David Korczynski <david@adalogics.com>

.github/workflows/cifuzz.yml

@@ -0,0 +1,34 @@
+name: CIFuzz
+on: [pull_request]
+permissions: {}
+jobs:
+ Fuzzing:
+   runs-on: ubuntu-latest
+   permissions:
+     security-events: write
+   steps:
+   - name: Build Fuzzers
+     id: build
+     uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
+     with:
+       oss-fuzz-project-name: 'open5gs'
+   - name: Run Fuzzers
+     uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
+     with:
+       oss-fuzz-project-name: 'open5gs'
+       fuzz-seconds: 300
+       output-sarif: true
+   - name: Upload Crash
+     uses: actions/upload-artifact@v3
+     if: failure() && steps.build.outcome == 'success'
+     with:
+       name: artifacts
+       path: ./out/artifacts
+   - name: Upload Sarif
+     if: always() && steps.build.outcome == 'success'
+     uses: github/codeql-action/upload-sarif@v2
+     with:
+      # Path to SARIF file relative to the root of the repository
+      sarif_file: cifuzz-sarif/results.sarif
+      checkout_path: cifuzz-sarif
+      category: CIFuzz