Remove warnings in CUDA 11.6 and clang 13.

The following warnings are removed:

• CUDA 11.6 complains that diag_suppress is deprecated. This MR uses nv_diag_suppress conditionally on checking the CUDACC version.
• Fixed some warnings clang 13 complained about, concretely about a VP check that defined an unused variable.

added RTA label

assigned to @msaur

@dcampora Can I run a ci-test or should I wait?

added only GitLab CI label

resolved all threads

approved this merge request

enabled an automatic merge when the pipeline for a60fe089 succeeds

unapproved this merge request

unassigned @msaur

This is a trivial MR. Setting it to merge automatically given a green CI pass.

merged

mentioned in commit aca66314

mentioned in issue Moore#411 (closed)