[9.11] Drop "stress" tests and pairwise jobs
In non-EoL branches these jobs were ported to AWS, older configurations won't work. Same for the pairwise job, just porting the job to Debian "bookworm" won't work.
In non-EoL branches these jobs were ported to AWS, older configurations won't work. Same for the pairwise job, just porting the job to Debian "bookworm" won't work.