[BUG] yurtappset fuzzer fails to build in OSS-Fuzz due to missing imports

[kyakdan]

What happened: Building the fuzzer failed in OSS-Fuzz

What you expected to happen: Fuzzers to be built in OSS-Fuzz

How to reproduce it (as minimally and precisely as possible): Build the project in OSS-Fuzz: python3 infra/helper.py build_fuzzers openyurt

Anything else we need to know?:

Environment:

• OpenYurt version:
• Kubernetes version (use kubectl version):
• OS (e.g: cat /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Others:

others

/kind bug