[FEA]: Unify `equal_to_value`

[miscco]

Is this a duplicate?

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Area

General CCCL

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

We have different definitions and implementations for equal_to_value

This is a predicate which is effectively ::cuda::std::bind(::cuda::std::equal_to<>, value)

We also have

• equal_to_one
• equal_to_val
• equal_to_value
• equal_to_default_t
• equal_to_t

Describe the solution you'd like

We should unify all those individual implementations into one residing in cuda/__functional/equal_to_value.h

Describe alternatives you've considered

No response

Additional context

No response