VectorStore bug fixes

[adolkhan]

🚀 🚀 Pull Request

Checklist:

• My code follows the style guidelines of this project and the Contributing document
• I have commented my code, particularly in hard-to-understand areas
• I have kept the coverage-rate up
• I have performed a self-review of my own code and resolved any problems
• I have checked to ensure there aren't any other open Pull Requests for the same change
• I have described and made corresponding changes to the relevant documentation
• New and existing unit tests pass locally with my changes

Changes

1. Fix user backwards compatibility issue
2. Fix empty input error and empty embedding function return
3. Raise exception when both query and embedding are specified

[FayazRahman]

will kwargs surely have embedding and query keys?

[codecov]

Codecov Report

Patch coverage: 25.00% and project coverage change: -0.01 ⚠️

Comparison is base (5f17163) 84.72% compared to head (e2fe991) 84.71%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2441      +/-   ##
==========================================
- Coverage   84.72%   84.71%   -0.01%     
==========================================
  Files         326      326              
  Lines       37779    37808      +29     
==========================================
+ Hits        32008    32030      +22     
- Misses       5771     5778       +7     

Flag	Coverage Δ
unittests	84.71% <25.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...lake/core/vectorstore/test_deeplake_vectorstore.py	68.75% <0.00%> (-0.88%)	⬇️
.../core/vectorstore/vector_search/dataset/dataset.py	97.36% <50.00%> (-0.64%)	⬇️
deeplake/core/vectorstore/vector_search/utils.py	91.44% <50.00%> (-0.56%)	⬇️

... and 18 files with indirect coverage changes

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