BUGFIX: fix random number generation with parallelization

.gitlab-ci.yml

bilby/bilby_mcmc/chain.py

bilby/bilby_mcmc/proposals.py

bilby/bilby_mcmc/sampler.py

bilby/core/fisher.py

bilby/core/prior/base.py

bilby/core/prior/conditional.py

bilby/core/prior/joint.py

bilby/core/result.py

bilby/core/sampler/base_sampler.py

bilby/core/sampler/dnest4.py

bilby/core/sampler/dynesty.py

bilby/core/sampler/proposal.py

bilby/core/sampler/ptemcee.py

bilby/core/sampler/ultranest.py

bilby/core/utils/__init__.py

bilby/core/utils/random.py

bilby/core/utils/series.py

bilby/gw/conversion.py

bilby/gw/likelihood/base.py