Bump CMake version to at least 3.16

[KFilipek]

Bump CMake version to at least 3.16

Rationale

We should keep the latest possible version for supported OSes.
Here is a support matrix for OneAPI 2025.0:

• Red Hat Enterprise Linux* 8.x, 9.x
• Ubuntu 22.04, 24.04
• Fedora* 39, 40
• SuSE LINUX Enterprise Server* 15 SP4, SP5, SP6
• Debian* 11, 12
• Amazon Linux 2022, 2023
• Rocky Linux 9
• WSL 2 (except oneCCL)
  Source: https://www.intel.com/content/www/us/en/developer/articles/system-requirements/intel-oneapi-base-toolkit-system-requirements.html

Notice:
CMake 3.14 is below version supported under Ubuntu 20.04 which is 3.16: CMake@Ubuntu 20.04

Description

N/A

API Changes

N/A

Implementation details

Best:
3.14 -> 3.20

Meta

[PatKamin]

I think that we should stick with the current version of CMake unless we use some features that require higher version. This way UMF can be built on as many environments as possible.

[lukaszstolarczuk]

I agree with @PatKamin, we should rather bump CMake version if we need a specific CMake fuction/macro. I believe CMake guarantee a good backward compatibility.