refactor: Migrate EmplaceCoinInternalDANGER to try_emplace #30637

1. 
   l0rinc commented at 3:43 pm on August 12, 2024: contributor

   Leftover from #28280 (review):

   try_emplace doc states

   2. Behaves like emplace except that the element is constructed as value_type(std::piecewise_construct, std::forward_as_tuple(std::move(k)), std::forward_as_tuple(std::forward(args)…))

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   The DANGER part in the method’s name refers to:

   NOT FOR GENERAL USE

2. Migrate EmplaceCoinInternalDANGER to try_emplace

   https://en.cppreference.com/w/cpp/container/map/try_emplace states
   > 2) Behaves like emplace except that the element is constructed as
   value_type(std::piecewise_construct,
              std::forward_as_tuple(std::move(k)),
              std::forward_as_tuple(std::forward<Args>(args)...))
   
   The DANGER part in the method's name refers to
   https://github.com/bitcoin/bitcoin/pull/19806/commits/f6e2da5fb7c6406c37612c838c998078ea8d2252#diff-095ce1081a930998a10b37358fae5499ac47f8cb6f25f5df5d88e920a54e0341R272 i.e.:
   > NOT FOR GENERAL USE

   aea6202dcc
3. 
   DrahtBot commented at 3:43 pm on August 12, 2024: contributor

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4. DrahtBot added the label Refactoring on Aug 12, 2024
5. l0rinc marked this as ready for review on Aug 12, 2024
6. l0rinc closed this on Sep 9, 2024

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7. l0rinc deleted the branch on Sep 9, 2024

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Refactoring