ci: do not run undefined for clusterfuzzlite

as it takes too long to build

(cherry picked from commit 6d52bcb)

Author: catenacyber

.clusterfuzzlite/project.yaml

@@ -7,7 +7,6 @@ auto_ccs:
 sanitizers:
   - address
   - memory
-  - undefined
 fuzzing_engines:
   - afl
   - honggfuzz

.github/workflows/cifuzz.yml

@@ -17,7 +17,7 @@ jobs:
    strategy:
      fail-fast: false
      matrix:
-       sanitizer: [address, undefined]
+       sanitizer: [address]
    steps:
    - name: Clear unnecessary files
      run: |