ifx version 2023.2.0: '-check all' conflicts with '-static'

The newest LLVM-based Intel compiler ifx version 2023.2.0 does not like to combine the flags -static with -check all (or more specifically -check uninit), see Job #285312.

@Hofmann do you think we need the static flag, or can we get rid of it? Alternatively, we could change configure.sh to not re-use the production flags.