[CMake] Set the minimum required version to 3.23

[ferdymercury]

This version of CMake was released in March 2022
https://github.com/Kitware/CMake/releases/tag/v3.23.0

This version is required to use FILE_SETs, which could help towards #16327 and #18419.

[guitargeek]

Unfortunately, we still have older CMake versions on the platforms that we still support:

• ubuntu2204 - cmake version 3.22.1 (end of life April 2027)
• debian125 - cmake version 3.25.1 (end of life 30 Jun 2028)
• alma8 - cmake version 3.26.5
• ubuntu2404 - cmake version 3.28.3
• macOS 14 - cmake version 3.29.5

On Windows, I don't know.

So I think in practice, that means we can only require CMake 3.23+ when Ubuntu 22.04 is end-of-life in two years 🙁

By the way, so far our strategy has been to just use the same minimum CMake version as LLVM.

[ferdymercury]

@dannf @roehling
Is there any remote plan / chance to bump Ubuntu's 22.04 cmake version from 3.22 to 3.23 ?

[github-actions]

Test Results

    17 files      17 suites   2d 14h 57m 35s ⏱️
 3 632 tests  3 629 ✅ 0 💤 3 ❌
61 314 runs  61 302 ✅ 5 💤 7 ❌

For more details on these failures, see this check.

Results for commit f441fa0.