In order to be able to also do this with Qt6 we can't currently rely on
'random distro' to be able to give us an environment sufficient for
running clang and clazy, so use the CI system setup instead
A side effect is that we get a newer clazy and clang-tidy and thus is a
few more issues to either ignore or fix.
Also, ask ninja to continue as long as possible rather than stop at
first error to be able to get succes in as few runs as possible
Disable a few new warnings in clang-tidy
bugprone-implicit-widening-of-multiplication-result and
bugprone-easily-swappable-parameters seem like would be nice to fix, but
no time now
Disable bugprone-suspicious-include since it's triggered by the moc
includes
Disable bugprone-reserved-identifier since it's triggered by all our
_OKULAR defines, and yes even if the spec says that underscore is
reserved, are we going to be that unlucky that the library decides to
start using _OKULAR ? not probably
Add two TODOs for the future to make NormalizedRect/Point faster
Silence a warning about a quick moving QString if we make it non const
Silence a uchar vs char warning that is in decades old code so
experience seems to suggest it's ok.
