Use qualified details::move

[robertfalkenberg]

This PR changes unqualified move calls to qualified versions details::move.

This avoids a warning unqualified call to 'std::move' if an unqualified move resolves to std::move.

For more info see -Wunqualified-std-cast-call or https://reviews.llvm.org/D119670?id=408276

Example Warning/Error:

[...]backward.hpp:2642:34: error: unqualified call to 'std::move' [-Werror,-Wunqualified-std-cast-call]
 2642 |                     elf_handle = move(debuglink_elf);
      |                                  ^
      |                                  std::

I think this PR could also replace #349.

[robertfalkenberg]

Hello @bombela,

if I have overlooked anything that stands in the way of the merge, please let me know. I would be happy to take this into account.

Kind regards

[robertfalkenberg]

Godbolt example with clang 20.1.0: https://godbolt.org/z/Gz8Tqaxqc