cmake: Bump minimum required CMake version to 3.22 #1675

1. 
   hebasto commented at 11:06 am on May 30, 2025: member

   Ubuntu 20.04 LTS has reached the End of Standard Support. There no longer appear to be compelling reasons to maintain compatibility with CMake 3.16. The new suggested minimum, CMake 3.22, is shipped with Ubuntu 22.04 LTS, which is supported until April 2027.

   This PR also introduces new CMake policies, from CMP0098 to CMP0128. Some of these may warrant the reviewers’ attention:

   • CMP0099: Link properties are transitive over private dependencies of static libraries.
   • CMP0117: MSVC RTTI flag /GR is not added to CMAKE_CXX_FLAGS by default.
   • CMP0126: set(CACHE) does not remove a normal variable of the same name.
   • CMP0128: Selection of language standard and extension flags improved.
2. cmake: Bump minimum required CMake version to 3.22

   Ubuntu 20.04 LTS has reached the end of standard support. There no
   longer appear to be compelling reasons to maintain compatibility with
   CMake 3.16.
   The new suggested minimum, CMake 3.22, is shipped with Ubuntu 22.04 LTS,
   which is supported until April 2027.
   
   This change also introduces new CMake policies, from CMP0098 to CMP0128.

   3af71987a8
3. real-or-random added the label build on May 30, 2025
4. real-or-random approved
5. 
   real-or-random commented at 11:48 am on May 30, 2025: contributor

   utACK 3af71987a8f18b96dd21d8a4642df6f9e6e4c9c7
6. real-or-random merged this on Jun 4, 2025
7. real-or-random closed this on Jun 4, 2025

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8. real-or-random added the label needs-changelog on Jun 4, 2025
9. hebasto deleted the branch on Jun 4, 2025

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hebasto real-or-random

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