use invokelatest to access bindings generated with Core.eval

[benlorenz]

To fix these warnings (future errors) during precompilation on julia nightly:

┌ CxxWrap
│  WARNING: Detected access to binding `StdLib.__cxxwrap_pointers` in a world prior to its definition world.
│    Julia 1.12 has introduced more strict world age semantics for global bindings.
│    !!! This code may malfunction under Revise.
│    !!! This code will error in future versions of Julia.
│  Hint: Add an appropriate `invokelatest` around the access to this binding.
│  WARNING: Detected access to binding `StdLib.__cxxwrap_methodkeys` in a world prior to its definition world.
│    Julia 1.12 has introduced more strict world age semantics for global bindings.
│    !!! This code may malfunction under Revise.
│    !!! This code will error in future versions of Julia.
│  Hint: Add an appropriate `invokelatest` around the access to this binding.
└  

cc: @fingolfin

Depending on the timeline for 0.17 it might be good to have this in a 0.16.1 release as well.

[barche]

Thanks! I should indeed make work of the 0.17 release.