testbench CI: keep only WRPC simulations for now

5 jobs from proposed_master in 11 minutes and 55 seconds (queued for 8 seconds)
Status Job ID Name Coverage
  Wrpc Compile
passed #1054
modelsim 10.0c
job_wrpc_compile

00:18

 
  Wrpc Syn
passed #1055
ise
job_wrpc_spec

11:33

passed #1056
ise
job_wrpc_svec

11:21

failed #1057
16.0 quartus
job_wrpc_vfchd

03:22

 
  Wrpc Sim
skipped #1058
modelsim 10.0c
job_wrpc_sim