Updated the compatibility for UCM CMake macros

[trueqbit]

Raised the minimum required version of CMake to 3.5, but more importantly indicated the maximum known compatibility to be 3.31, which makes it kind of future-proof.

[sergio-nsk]

This change does not work with CMake 4.0.0 @trueqbit cotire/CMakeLists.txt and cotire/CMake/cotire.cmake also need this change.

CMake Error at third_party/ucm/cotire/CMake/cotire.cmake:40 (cmake_minimum_required):
  Compatibility with CMake < 3.5 has been removed from CMake.

  Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
  to tell CMake that the project requires at least <min> but has been updated
  to work with policies introduced by <max> or earlier.

  Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
Call Stack (most recent call first):
  third_party/ucm/cmake/ucm.cmake:19 (include)
  solid.cmake:158 (include)
  CMakeLists.txt:[37](https://github.com/snxd/client/actions/runs/14225339136/job/39863425460?pr=3066#step:6:38) (include)

[trueqbit]

This change does not work with CMake 4.0.0 @trueqbit cotire/CMakeLists.txt and cotire/CMake/cotire.cmake also need this change.

The problem is that cotire is a submodule.

[sergio-nsk]

Perhaps, cotire should be removed.

[trueqbit]

@sergio-nsk Perhaps, cotire should be removed.

Well, I am not the maintainer of this repository and such a decision is beyond my competence I am afraid... We currently only need the ucm.cmake file in sqlite_orm.

cotire seems to be used for providing unity builds, so it seems to be useful. Perhaps a copy of cotire might be a solution? @nmoinvaz @onqtam