fixed loop over injections/event

Combined the loop iterating over injections in rapidpe-rift_pipe to a single loop including events. Runs submitted and ran without any failure

injections: https://ldas-jobs.ligo.caltech.edu/~vinaya.valsan/RapidPE/test_rpe_pipe/test_bns_injections/ events: https://ldas-jobs.ligo.caltech.edu/~vinaya.valsan/RapidPE/test_rpe_pipe/test_event/

Fix https://git.ligo.org/rapidpe-rift/rapidpe-rift-submission-scripts/-/issues/21