[Standup] Add all rendered environment variables as a configmap

[maugustosilva]

This configmap, llm-d-benchmark-standup-parameters is accessible by the harness pod

Additionally take a list of all running pods at the end of the running of a benchmark (goal is to detected any restarts on pods serving models during benchmark)

Finally, fix a bug on the (automatic) detection of admin privileges

[namasl]

This is useful, but there are still some unresolved bits. For example, if I want to get the args used to execute vllm this is not simple:

$ oc get cm llm-d-benchmark-standup-parameters -o yaml | grep -i args      
    base64_args: -w0
    vllm_modelservice_decode_extra_args: /tmp/tmp.yjfWhrk4pN
    vllm_modelservice_prefill_extra_args: /tmp/tmp.WYtBTiGjJt
    vllm_standalone_args: REPLACE_ENV_LLMDBENCH_VLLM_STANDALONE_PREPROCESS____;____vllm____serve____REPLACE_ENV_LLMDBENCH_DEPLOY_CURRENT_MODEL____--no-enable-prefix-caching____--load-format____REPLACE_ENV_LLMDBENCH_VLLM_COMMON_VLLM_LOAD_FORMAT____--port____REPLACE_ENV_LLMDBENCH_VLLM_COMMON_INFERENCE_PORT____--max-model-len____REPLACE_ENV_LLMDBENCH_VLLM_COMMON_MAX_MODEL_LEN____--disable-log-requests____--gpu-memory-utilization____REPLACE_ENV_LLMDBENCH_VLLM_COMMON_ACCELERATOR_MEM_UTIL____--tensor-parallel-size____REPLACE_ENV_LLMDBENCH_VLLM_COMMON_TENSOR_PARALLELISM____--model-loader-extra-config____"$LLMDBENCH_VLLM_COMMON_MODEL_LOADER_EXTRA_CONFIG"
    vllm_standalone_launcher_args: REPLACE_ENV_LLMDBENCH_VLLM_STANDALONE_PREPROCESS____;____uvicorn____launcher:app____--host____0.0.0.0____--log-level____info____--port____REPLACE_ENV_LLMDBENCH_VLLM_STANDALONE_LAUNCHER_PORT

[namasl]

Some unresolved parts remain, but that can be addressed in later PRs.