[FEA]: Provide symbol export control in cuProj

[harrism]

Is this a new feature, an improvement, or a change to existing functionality?

New Feature

How would you describe the priority of this feature request

Medium

Please provide a clear description of problem you would like to solve.

cuProj is a header-only library, so we should allow each shared library that uses cuProj to have an internal unique copy of all device symbols. To do so, we should provide export attributes as was done in RMM: https://github.com/rapidsai/rmm/blob/branch-25.02/include/rmm/detail/export.hpp

Describe any alternatives you have considered

No response

Additional context

No response