Change std::copy to detail::copy in chrono to fix MSVC 19.41.34120 compile errors

[tinfoilboy]

Follows the same rationale as commit 6e462b8 to replace std::copy usage with the library detail::copy. Without this, latest MSVC versions will fail to compile when using chrono types.

Compile result before changing to detail::copy: https://www.godbolt.org/z/G5MGeWva6

Compile result after: https://www.godbolt.org/z/vYex485oz