[RTA/DPA BW tests]: Cherry-pick bandwidth test maintenance MR to master

[RTA/DPA BW tests]: Minor bandwidth test maintenance

See merge request !4975 (merged)

(cherry picked from commit 1030e90e)

af5f4b7b Rename hlt2_bandwidth_input_2024 -> hlt2_bandwidth_input ed63c16b MB/s in tables rather than GB/s ; prompted a big reduction of hard-coded strings 9ab37c59 Fix booboos 992fcf30 Prefer a namedtuple for setting of tolerances rather than a plain list b4831500 Prevent possible race condition with read_event_numbers.py

Co-authored-by: Miroslav Saur miroslav.saur@cern.ch

Need to port to master now as the PRConfig changes that came with !4975 (merged) have broken bandwidth tests on master - whoops!