Update labels for new nightly system

Dmitry Popovrequested to merge
update_labels_for_new_nightlysys into master

This MR updates labels of PR tests for the new nightly system:

perf-el9               ->  perf
cuda-tests             ->  cuda
nightly-tests-j16-el9  ->  nproc-16

fyi @clemenci

Merge request reports