Backport 2.28 : Remove -wDocumentation from Clang builds #7092
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Description
As per issue #6960, Clang 15/16 seems to have introduced new rules for -Wdocumentation with respect to /return and /retval, which contradicts the rules we are using with Doxygen.
This PR removes the usage of this warning from clang builds, as Clang 15 will soon be the default on rolling release builds, and those users will be broken.
This is a backport of #6966
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