text: Title: Trust_remote_code not pass to router,  TGI launcher get stuck if model tokenizer has custom code
  Body: ### System Info
  TGI version: v2.3.1
  Model: Baichuan2-7B
  The full command line (**has set trust-remote-code**): 
  ```shell
  export USE_PREFIX_CACHING=0
  export ATTENTION=paged
  export ASCEND_RT_VISIBLE_DEVICES=4
  model_id=/home/data/models/baichuan2-7b
  
  text-generation-launcher \
  --model-id $model_id \
  --port 12359 \
  --max-input-length 2048 \
  --max-total-tokens 2560 \
  --max-batch-prefill-tokens 4096 \
  --max-waiting-tokens 20 \
  --max-concurrent-requests 200 \
  --waiting-served-ratio 1.2 \
  --trust-remote-code
  ``` 
  
  From log ,we can see **trust_remote-code is set**:
  ```
  2024-10-15T07:47:47.879952Z  WARN text_generation_launcher: `trust_remote_code` is set. Trusting that model `/home/data/models/baichuan2-7b` do not contain malicious code.
  2024-10-15T07:47:47.880230Z  INFO download: text_generation_launcher: Starting check and download process for /home/data/models/baichuan2-7b
  2024-10-15T07:47:52.691488Z  INFO text_generation_launcher: Files are already present on the host. Skipping download.
  2024-10-15T07:47:53.696712Z  INFO download: text_generation_launcher: Successfully downloaded weights for /home/data/models/baichuan2-7b
  ``` 
  
  But after warmup, it gets stuck, and suggest `trust_remote_code=True`
  ```
  2024-10-15T07:48:19.445156Z  INFO text_generation_router_v3: backends/v3/src/lib.rs:102: Setting max batch total tokens to 25344
  2024-10-15T07:48:19.445326Z  INFO text_generation_router_v3: backends/v3/src/lib.rs:127: Using backend V3
  The repository for /home/data/models/baichuan2-7b contains custom code which must be executed to correctly load the model. You can inspect the repository content at https://hf.co//home/data/models/baichuan2-7b.
  You can avoid this prompt in future by passing the argument `trust_remote_code=True`.
  ``` 
  
  ### Information
  
  - [ ] Docker
  - [ ] The CLI directly
  
  ### Tasks
  
  - [ ] An officially supported command
  - [ ] My own modifications
  
  ### Reproduction
  
  Add     ` , ("trust_remote_code","True".to_string())`   as AutoTokenizer.from_pretrained  kwargs
  [text-generation-inference/router/src/server.rs](https://github.com/huggingface/text-generation-inference/blob/a094729386b5689aabfba40b7fdb207142dec8d5/router/src/server.rs#L1624-L1625)
  Lines L1624-L1625:
  ```rust
      let tokenizer: Option<Tokenizer> = tokenizer_filename.and_then(|filename| {
          use pyo3::prelude::*;
          let convert = pyo3::Python::with_gil(|py| -> PyResult<()> {
              let transformers = py.import_bound("transformers")?;
              let auto = transformers.getattr("AutoTokenizer")?;
              let from_pretrained = auto.getattr("from_pretrained")?;
              let args = (tokenizer_name.to_string(),);
              let kwargs = [(
                  "revision",
                  revision.clone().unwrap_or_else(|| "main".to_string()),
              )
              , ("trust_remote_code","True".to_string())
              ]
              .into_py_dict_bound(py);
              let tokenizer = from_pretrained.call(args, Some(&kwargs))?;
              let save = tokenizer.getattr("save_pretrained")?;
              let args = ("out".to_string(),);
              save.call1(args)?;
              Ok(())
          })
  ``` 
  
  It runs OK:
  ```
  2024-10-15T08:44:56.377562Z  INFO text_generation_router_v3: backends/v3/src/lib.rs:102: Setting max batch total tokens to 25344
  2024-10-15T08:44:56.377648Z  INFO text_generation_router_v3: backends/v3/src/lib.rs:127: Using backend V3
  2024-10-15T08:45:01.690286Z  INFO text_generation_router::server: router/src/server.rs:1671: Using config Some(Baichuan)
  2024-10-15T08:45:01.690369Z  WARN text_generation_router::server: router/src/server.rs:1716: no pipeline tag found for model /home/data/models/baichuan2-7b
  2024-10-15T08:45:01.690379Z  WARN text_generation_router::server: router/src/server.rs:1818: Invalid hostname, defaulting to 0.0.0.0
  2024-10-15T08:45:01.801597Z  INFO text_generation_router::server: router/src/server.rs:2211: Connected
  2024-10-15T08:45:10.554155Z  INFO generate{parameters=GenerateParameters { best_of: None, temperature: None, repetition_penalty: None, frequency_penalty: None, top_k: None, top_p: None, typical_p: None, do_sample: false, max_new_tokens: Some(20), return_full_text: None, stop: [], truncate: None, watermark: false, details: false, decoder_input_details: false, seed: None, top_n_tokens: None, grammar: None, adapter_id: None } total_time="576.72759ms" validation_time="570.99µs" queue_time="91.36µs" inference_time="576.06533ms" time_per_token="28.803266ms" seed="None"}: text_generation_router::server: router/src/server.rs:402: Success
  ``` 
  
  ### Expected behavior
  
  Text-generation-launcher argument "trust-remote-code" should be passed to text-generation-router for constucting a fast tokenizer!