cleanup of upgrade Brunel options

Towards Moore#34 (closed)

The deleted tests and options were either moved to Moore or omitted on purpose (see Moore#34 (closed)))

See also discussions in !916 (closed) and Moore!325 (merged)

Related MRs are Moore!330 (merged) (VeloOnlySIMD in Moore)
lhcb-core/lhcb-benchmark-scripts!43 (merged) (new throughput tests to replace NoCutNoFitFastForwardTBL and VeloOnlySIMD; and single threaded, multi-job Hlt2Reconstruction in Moore)
lhcb-core/lhcb-benchmark-scripts!44 (merged) (Moore scaling test)
lhcb-core/lhcb-benchmark-scripts!45 (merged) (cleanup of Brunel related scripts)
lhcb-core/LHCbNightlyConf!275 (merged) (new test schedule)

\cc @cattanem @pkoppenb @sstahl

Certainly there are more people who should be notified and have a look, please add them to the discussion!