NCAR derecho compilers

[dabail10]

A couple things here.

1. We should get rid of derecho_intel and start doing tests with intel-oneapi. Also, intel-classic will be going away, so will need to be removed eventually.

2. All of the cheyenne options need to be removed.

I have a set of PRs for dsnow / dsnown and I will do this.

[dabail10]

Also we are getting a ton of warnings as follows with the intel compilers:

ifx: command line warning #10121: overriding '-march=core-avx2' with '-march=core-avx2'

We just need to get rid of the -march=core-avx2 here.

[apcraig]

I will be working on the intel-oneapi port. If you know how to do that, go for it. Most of it's there, it's just wasn't working a couple months ago due to compiler bugs.

Lets leave the intel-classic there for now. Also, lets leave the cheyenne stuff for now. The more examples we have, the better. We can get rid of cheyenne in a couple years.

The warning message #10121 is irritating, but as far as I'm concerned, that a problem with the compiler, not with our compiler options. I think explicitly setting -march is better than not.

[dabail10]

In terms of the warning, this -march flag is redundant. It is already on by default.

[eclare108213]

Can this issue be closed now, since #974 was merged?