fix qdrant default embedder

[ysolanky]

Description

Removes OpenAI embedder as the default embedder for Qdrant

Type of change

Please check the options that are relevant:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Model update
• Infrastructure change

Checklist

• My code follows Phidata's style guidelines and best practices
• I have performed a self-review of my code
• I have added docstrings and comments for complex logic
• My changes generate no new warnings or errors
• I have added cookbook examples for my new addition (if needed)
• I have updated requirements.txt/pyproject.toml (if needed)
• I have verified my changes in a clean environment

[DarkDk123]

Hey @ysolanky,
I am new to open source contributions & wanna learn.

Upon seeing your Merge Request, i cannot understand why you're moving OpenAIEmbedder from default argument to the constructor body? isn't it same!?