[infra] Support RPM-based distributions with SELinux enabled

I was doing some testing of new local build, and trying to fuzz it.

My command:
```bash
python infra/helper.py build_image open5gs
python infra/helper.py build_fuzzers open5gs --engine libfuzzer --sanitizer address
python infra/helper.py check_build open5gs --engine libfuzzer --sanitizer address

python infra/helper.py run_fuzzer open5gs --engine libfuzzer --sanitizer address gtp_message_fuzz
ERROR:__main__:gtp_message_fuzz does not seem to exist. Please run build_fuzzers first.
```

Debug:
```bash
ls build/out/open5gs/

gtp_message_fuzz gtp_message_fuzz_seed_corpus.zip lib llvm-symbolizer nas_message_fuzz nas_message_fuzz_seed_corpus.zip
```

Start with infra/helper.py and reproduce the listed build_fuzzers, check_build, and run_fuzzer commands for open5gs, comparing the reported missing fuzzer with build/out/open5gs/ where gtp_message_fuzz is present. Before changing behavior, resolve how this reproduction relates to the title's RPM-based distributions and SELinux scope; done should mean the intended workflow works on those environments.

Written by the indexing model from the issue text.