Include <cstdint> in generic_float.hpp

[richagadgil]

Needed to address ticket #SWDEV-498402, where required header for fixed-width integer types is missing resulting in the following errors for multiple types:

error: no type named 'uint8_t' in namespace 'std'
2024-11-14T13:09:40.241005703Z    80 |     using type = std::uint8_t;