Auto-gen submit scripts for all CI tests on HPC

[yslan]

In order to run CI tests on HPC, it'd be convenient to have a wrapper function in nrsqsub_util that automatically grep ctests and cast them into submit script.

User can decide resources per test in the unit of nodes.
And, it either run sequentially or concurrently as an option.

The tricky part is to collect passed/failed info and logfile management.

[yslan]

Let's break it down:
examples/CMakeLists.txt registers all tests
ctest -R "^ethier_" runs all tests start with "ethier_" and collect passed/failed info for each test.
On HPC, all tests should work using 1 and 2 nodes.

It should generate some traceable report logfile and if possible, shown in github.

[kris-rowe]

If we want all of the above it is likely easier to run all of the CI tests through reframe instead of CTest.

[yslan]

I was thinking of re-using all existing submit script but with extra bash hacks.

At some point, we have this discussion about whether we should switch all of the submit script to python.
It's intriguing but definitely some works require.