[CUCO][FEA]: Migrate host retrieve_all API for fixed_capacity_set #11138

Is this a duplicate?

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Area

CUDA Experimental (cudax)

Is your feature request related to a problem? Please describe.

This is part of #4308.

I'd like to migrate the host retrieve_all API from cuco::static_set to cudax::cuco::fixed_capacity_set.

Describe the solution you'd like

Migrate the APIs and add corresponding tests.