Stop using the now deprecated std::is_trivial.

[Romain-Geissler-1A]

Issue #, if available:

Description of changes:

std::is_trivial is deprecated in C++26. Using gcc 15 and C++26 yields this warning:

/data/mwrep/res/mdw/SIOTF/internal/osp/aws_sdk/25-0-0-1/include/aws/core/utils/memory/AWSMemory.h: In function 'Aws::UniquePtr<T> Aws::MakeUnique(const char*, ArgTypes&& ...)': /data/mwrep/res/mdw/SIOTF/internal/osp/aws_sdk/25-0-0-1/include/aws/core/utils/memory/AWSMemory.h:307:56: error: 'template<class _Tp> struct std::is_trivial' is deprecated: use 'is_trivially_default_constructible && is_triviall y_copyable' instead [-Werror=deprecated-declarations]
  307 |         static_assert(!std::is_array<T>::value || std::is_trivial<T>::value,
      |                                                        ^~~~~~~~~~

So do as gcc suggests, and replace it by a combination of is_trivially_default_constructible and is_trivially_copyable.

Check all that applies:

• Did a review by yourself.
• Added proper tests to cover this PR. (If tests are not applicable, explain.)
• Checked if this PR is a breaking (APIs have been changed) change.
• Checked if this PR will not introduce cross-platform inconsistent behavior.
• Checked if this PR would require a ReadMe/Wiki update.

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[sbiscigl]

yep, seems like the right thing to do, for logistical reasons i have to pull your change onto a branch on the main repo to run CI on it. will be merged in this PR #3820

Thanks for contributing!

[sbiscigl]

change has been merged, give a shout if you have any questions or find anything else!