Add benchmarks on TrucnIndex.Delete

Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)
Combined AddGet benchmark

Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)
Merge pull request #6664 from LK4D4/bench_on_truncindex_delete

Add benchmarks on TrucnIndex.Delete