[WIP] Retire CagraIndexParamsFactory to use CuVS's internal heuristicAPI, Add ParamsBase for common parameters

[narangvivek10]

Code changes to:

• Retire CagraIndexParamsFactory to use CuVS's internal heuristic API as planned before. Now with Strategy.HEURISTIC as the default recommended strategy, we will be able to tune indexes with the standard beam width and max connection parameters, and the CAGRA's parameters, like graph degree, intermediate graph degree, are automatically estimated internally. This is now applicable for both - Index on GPU and search on CPU, and index and search on the GPU APIs.
• Add ParamsBase class for bringing common input parameters in one base class for code deduplication in AcceleratedHNSWParams and GPUSearchParams.
• Fix the issue with using odd CAGRA graphDegree values internally.

Fixes #149
Fixes #127

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