Removed deprecated CMake functions and removed unused link

[nepp95]

This PR removes deprecated CMake functions as well as removing the call to link the glm library which is never compiled, only included as a header. There also was a compilation error because of not including the vector std lib.

As part of updating the CMake function, the find_package calls are also redundant since they can be done as part of the FetchContent_Declare call. When adding FIND_PACKAGE_ARGS to the call, it will attempt to find it first using find_package.

This ensures this repository stays relevant and compilable out of the box instead of having to fix the CMakeLists file in the future. On most modern CMake versions, the current version already spits out warnings while configuring.

[nepp95]

I should add:

If you want to reference a specific commit, that can also be put in place of the tag with the same syntax (also using GIT_TAG). This is the recommended way per CMake documentation, although a tag in most cases should suffice.