Merge branch '336-clear-for-vectors' into 'feature'

[336-clear-for-vectors] added vectors clear and fixed added one in Precon

Closes #336

See merge request !311
10 jobs for feature in 23 minutes and 23 seconds (queued for 9 seconds)
Status Name Job ID Coverage
  Build
passed build-mpp #501574
docker

00:17:50

 
  Test
passed ctest-mpp #501575
docker

00:05:32

passed mpitest-mpp #501576
docker

00:03:35

 
  Downstream
passed trigger-cardmech

passed trigger-dgwave

passed trigger-fwi

passed trigger-mluq

passed trigger-navierstokes

passed trigger-spacetime

passed trigger-tutorial