fix error message

[xinyual]

Description

fix error message for deploy model and model hash content.
After changing error, when I try:

{
  "name": "all-MiniLM-L6-v2",
  "version": "1.0.0",
  "description": "test model",
  "model_format": "TORCH_SCRIPT",
  "model_config": {
    "model_type": "bert",
    "embedding_dimension": 384,
    "framework_type": "sentence_transformers"
  },
  "url": "https://github.com/opensearch-project/ml-commons/raw/2.x/ml-algorithms/src/test/resources/org/opensearch/ml/engine/algorithms/text_embedding/all-MiniLM-L6-v2_torchscript_sentence-transformer.zip?raw=true"
}

Then get task returns

{
    "task_type": "REGISTER_MODEL",
    "function_name": "TEXT_EMBEDDING",
    "state": "FAILED",
    "worker_node": [
        "YGlxNankSXao_Ztt5VSprA"
    ],
    "create_time": 1706663983561,
    "last_update_time": 1706663991558,
    "error": "Hash code need to be provided when register via url.",
    "is_async": true
}

Issues Resolved

#1630

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (991193c) 82.84% compared to head (f096160) 82.85%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1967   +/-   ##
=========================================
  Coverage     82.84%   82.85%           
- Complexity     5449     5450    +1     
=========================================
  Files           522      522           
  Lines         21912    21915    +3     
  Branches       2228     2229    +1     
=========================================
+ Hits          18154    18157    +3     
  Misses         2847     2847           
  Partials        911      911           

Flag	Coverage Δ
ml-commons	82.85% <100.00%> (+<0.01%)	⬆️

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