java/openjdk8 java/openjdk11 java/openjdk17 java/openjdk18 java/openjdk19 java/openjdk20 java/openjdk21 java/openjdk22: disable warnings as errors

Generally disable warnings-as-errors for all openjdk ports, removing all
the conditionals we have now for particular architectures and/or
compilers. It does not make sense to have this on by default, unless you
are an upstream maintainer.

PR: 281188
Approved by: maintainer timeout (2 weeks)
MFH: 2024Q3