science/py-phono3py: Fix build on 12/13 (broken due to missing libgomp.so); Add USES=blaslapack:openblas

libgomp.so was found in gcc8, which this ports doesn't explicitly depend on,
and openmp wasn't installed but the build was failing later on 12 due to the
lack of libgomp.so.

Solution: Move openmp dependency from LIB_DEPENDS to BUILD_DEPENDS/RUN_DEPENDS.

Reported by: Gleb Popov <6yearold@gmail.com> (USES=blaslapack:openblas)