fa199ee614 ci: Drop NO_WERROR=1 for clang-10 build (MarcoFalke)
fad2c200f4 build: Bump minimum Clang to clang-10 (MarcoFalke)
fad7cfee8d doc: Remove outdated CentOS comment (MarcoFalke)
Pull request description:
It doesn't make sense to support a minimum clang version that is difficult to install on all supported operating systems, which generally ship a later version:
* Ubuntu Focal 20.04: https://packages.ubuntu.com/focal/clang-10 and https://packages.ubuntu.com/focal/clang-12
* Debian Bullseye: https://packages.debian.org/bullseye/clang-13
* CentOS 8 Stream: All Clang versions from 11.0 to 15.0
Also, it allows to drop build code, which means it won't waste review when rolling over into cmake (`cmake/module/CheckStdFilesystem.cmake`).
ACKs for top commit:
hebasto:
ACK fa199ee614
fanquake:
ACK fa199ee614
Tree-SHA512: c1a0e8f191a6db866b8be3c9d254dc3f576fa021e2eaaeb68f3354554a8b38eaa90bbf9871ff92351b715e62a6b7b98cf94eba6dc53d7c951bddb6ad49ba7716