added a testcase for the interpolation of vectorial quantities

Description

corresponding to cfs!257 (merged)

( Summarise the changes introduced in this merge request )

CFS merge request: ( paste a link to the merge request in the upstream CFS project )

Check before assigning to a maintainer for review

• The history is clean
• New test cases are well-documented and understandable

Maintainer checks before merge

• The Testsuite pipeline passed and is recent (re-run the cfs-pipeline trigger job if necessary) If it failed to trigger an upstream pipeline, possible errors are
  • branch names do not match
  • there is no open merge request in the CFS project
• Check the pipeline of the upstream CFS merge request